US5404355A - Method for transmitting broadcast information in a digital control channel - Google Patents

Method for transmitting broadcast information in a digital control channel Download PDF

Info

Publication number
US5404355A
US5404355A US07956640 US95664092A US5404355A US 5404355 A US5404355 A US 5404355A US 07956640 US07956640 US 07956640 US 95664092 A US95664092 A US 95664092A US 5404355 A US5404355 A US 5404355A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
information
method
bcch
transmitted
mobile station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07956640
Inventor
Alex K. Raith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ericsson Inc
Original Assignee
Ericsson Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0212Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0212Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0219Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0225Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0245Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W68/00Notification of users, e.g. alerting for incoming communication or change of service
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/20Techniques for reducing energy consumption in wireless communication networks independent of Radio Access Technologies
    • Y02D70/25Techniques for reducing energy consumption in wireless communication networks independent of Radio Access Technologies in Discontinuous Transmission [DTX] networks

Abstract

The present invention provides a method for transmitting information on a communications channel, e.g. , a digital control channel between a base station and a mobile station in a cellular system. The method includes the steps of grouping the information into a plurality of information elements, providing at least one change flag to indicate whether the value of at least one of the information elements has changed and transmitting the change flag and the information element over the communications channel.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to wireless communication systems, and more particularly, to a method and apparatus for communicating messages over a digital control channel in a cellular radio system.

2. History of the Prior Art

In a typical cellular radio system, a geographical area, e.g., a metropolitan area, is divided into several cells, each of which is served by a base station having a limited radio coverage area. The base stations are connected to a mobile services switching center (MSC) which is, in turn, connected to the landline public switched telephone network (PSTN). Each user (mobile subscriber) in the cellular radio system is provided with a portable, pocket, hand-held or car-mounted device (mobile station) which communicates voice and/or data with a nearby base station and the MSC. The MSC facilitates communications, e.g., switches calls and controls signalling, between the mobile station and other mobile stations in the system or landline telephones in the PSTN. FIG. 1 illustrates the architecture of a conventional cellular radio system built according to the Advanced Mobile Phone Service (AMPS) standard.

In FIG. 1, an arbitrary geographic area may be seen divided into a plurality of contiguous radio coverage areas, or cells, C1-C10. While the system of FIG. 1 is, for illustration purposes, shown to include only ten cells, the number of cells may be much larger in practice. Associated with and located in each of the cells C1-C10 is a base station designated as a corresponding one of a plurality of base stations B1-B10. Each of the base stations B1-B10 includes a plurality of channel units, each comprising a transmitter, a receiver and a controller, as is well known in the art. In FIG. 1, the base stations B1-B10 are located at the center of the cells C1-C10, respectively, and are equipped with omni-directional antennas transmitting equally in all directions. In this case, all the channel units in each of the base stations B1-B10 are connected to one antenna. However, in other configurations of the cellular radio system, the base stations B1-B10 may be located near the periphery, or otherwise away from the centers of the cells C1-C10 and may illuminate the cells C1-C10 with radio signals directionally. For example, the base station may be equipped with three directional antennas, each one covering a 120 degrees sector cell as shown in FIG. 2. In this case, some channel units will be connected to one antenna covering one sector cell, other channel units will be connected to another antenna covering another sector cell, and the remaining channel units will be connected to the remaining antenna covering the remaining sector cell. In FIG. 2, therefore, the base station serves three sector cells. However, it is not always necessary for three sector cells to exist and only one sector cell needs to be used to cover, for example, a road or a highway.

Returning to FIG. 1, each of the base stations B1-B10 is connected by voice and data links to a mobile switching center (MSC) 20 which is, in turn, connected to a central office (not shown) in the public switching telephone network (PSTN) or a similar facility, e.g., an integrated system digital network (ISDN). The relevant connections and transmission modes between the mobile switching center MSC 20 and the base stations B1-B10, or between the mobile switching center MSC 20 and the PSTN or ISDN, are well known to those of ordinary skill in the art and may include twisted wire pairs, coaxial cables, fiber optic cables or microwave radio channels operating in either analog or digital mode. Further, the voice and data links may either be provided by the operator or leased from a telephone company (telco).

With continuing reference to FIG. 1, a plurality of mobile stations M1-M10 may be found within the cells C1-C10. Again, while only ten mobile stations are shown in FIG. 1, the actual number of mobile stations may be much larger in practice and will invariably exceed the number of base stations. Moreover, while none of the mobile stations M1-M10 may be found in some of the cells C1-C10, the presence or absence of the mobile stations M1-M10 in any particular one of the cells C1-C10 depends on the individual desires of each of the mobile subscribers who may travel from one location in a cell to another or from one cell to an adjacent or neighboring cell. Each of the mobile stations M1-M10 includes a transmitter, a receiver, a controller and a user interface, e.g., a telephone handset, as is well known in the art. Each of the mobile stations M1-M10 is assigned a mobile identification number (MIN) which, in the United States, is a digital representation of the telephone directory number of the mobile subscriber. The MIN defines the subscription of the mobile subscriber on the radio path and is sent from the mobile station to the MSC 20 at call origination and from the MSC 20 to the mobile station at call termination. Each of the mobile stations M1-M10 is also identified by an electronic serial number (ESN) which is a factory-set, "unchangeable" number designed to protect against the unauthorized use of the mobile station. At call origination, for example, the mobile station will send the ESN to the MSC 20. The MSC 20 will compare the received ESN to a "blacklist" of the ESNs of mobile stations which have been reported to be stolen. If a match is found, the stolen mobile station will be denied access.

Each of the cells C1-C10 is allocated a subset of the radio frequency (RF) channels assigned to the entire cellular system by the concerned government authority, e.g., the Federal Communications Commission (FCC) in the United States. Each subset of RF channels is divided into several voice or speech channels which are used to carry voice conversations, and at least one paging/access or control channel which is used to carry supervisory data messages, between each of the base stations B1-B10 and the mobile stations M1-M10 in its coverage area. Each RF channel comprises a duplex channel (bidirectional radio transmission path) between the base station and the mobile station. The RF consists of a pair of separate frequencies, one for transmission by the base station (reception by the mobile station) and one for transmission by the mobile station (reception by the base station). Each channel unit in the base stations B1-B10 normally operates on a preselected one of the radio channels allocated to the corresponding cell, i.e., the transmitter (TX) and receiver (RX) of the channel unit are tuned to a pair of transmit and receive frequencies, respectively, which is not changed. The transceiver (TX/RX) of the each mobile station M1-M10, however, may tune to any of the radio channels specified in the system.

Depending on capacity needs, one cell may have 15 voice channels, while another may have over a 100 voice channels, and corresponding channel units. Generally speaking, however, there is only one control channel (CC) in each omnidirectional or sector cell served by a base station, i.e., a base station serving an omnidirectional cell (FIG. 1 ) will have one control channel unit while a base station serving three sectors cells (FIG. 2) will have three control channel units. The RF (control and voice) channels allocated to any given cell may be reallocated to a distant cell in accordance with a frequency reuse pattern as is well known in the art. To avoid radio interference, all radio channels in the same cell will operate on different frequencies and, furthermore, the radio channels in any one cell will operate on a set of frequencies which is different from that used in any neighboring cell.

When in the idle state (not in the conversation state), each of the mobile stations M1-M10 tunes to and then continuously monitors the strongest control channel (generally, the control channel of the cell in which the mobile station is located at that moment) and may receive or initiate a telephone call through the corresponding one of the base stations B1-B10 which is connected to the mobile switching center MSC 20. When moving between cells while in the idle state, the mobile station will eventually "lose" radio connection on the control channel of the "old" cell and tune to the control channel of the "new" cell. The initial tuning to, and the change of, control channel are both accomplished automatically by scanning all the control channels in operation in the cellular system (in the United States, there are 21 "dedicated" control channels in each AMPS system, i.e., their TX/RX frequencies are predefined and cannot be changed, which means that the mobile station has to scan a maximum number of 21 channels to find the "best" control channel). When a control channel with good reception quality is found, the mobile station remains tuned to this channel until the quality deteriorates again. In this manner, all mobile stations are always "in touch" with the system.

While in the idle (standby) state, each of the mobile stations M1-M10 continuously determines whether a page message addressed to it has been received over the control channel. When, for example, an ordinary (landline) subscriber calls one of the mobile subscribers, the call is directed from the PSTN to the MSC 20 where the dialed number is analyzed. If the dialed number is validated, the MSC 20 requests some or all of the base stations B1-B10 to page the called mobile station throughout their corresponding cells C1-C10. Each of the base stations B1-B10 which receive the request from the MSC 20 will then transmit over the control channel of the corresponding cell a page message containing the MIN of the called mobile station. Each of the idle mobile stations M1-M10 will compare the MIN in the page message received over the control channel being monitored with the MIN stored in the mobile station. The called mobile station with the matching MIN will transmit a page response over the control channel to the base station which forwards the page response to the MSC 20.

Upon receiving the page response, the MSC 20 selects an available voice channel in the cell from which the page response was received and requests the base station in that cell to order the mobile station via the control channel to tune to the selected voice channel (the MSC keeps a list of all of the channels in its service area and their status, i.e., free, busy, blocked, etc., at any time). A through-connection is established once the mobile station has tuned to the selected voice channel. When, on the other hand, a mobile subscriber initiates a call, e.g., by dialing the telephone number of an ordinary subscriber and pressing the "send" button on the telephone handset in the mobile station, the MIN and ESN of the mobile station and the dialed number are sent over the control channel to the base station and forwarded to the MSC 20 which validates the mobile station, assigns a voice channel and establishes a through-connection for the conversation as before.

If the mobile station moves between cells while in the conversation state, a "handoff" of the call from the old base station to the new base station will take place. The MSC selects an available voice channel in the new cell and then orders the old base station to send to the mobile station on the current voice channel in the old cell a handoff message which informs the mobile station to tune to the selected voice channel in the new cell. The handoff message is sent in a "blank and burst" mode which causes a short but hardly noticeable break in the conversation. Upon receipt of the handoff message, the mobile station tunes to the new voice channel and a through-connection is established by the MSC via the new cell. The old voice channel in the old cell is marked idle in the MSC and may be used for another conversation.

In addition to call originations and page responses, an AMPS mobile station may access the cellular system for registrations. Two types of registrations are possible in AMPS: (i) periodic registration which is based on time or, more specifically, on the REGID value ("current time") and REGINCR value ("registration period") transmitted by the base station and the NXTREG value ("wake-up time") stored in the mobile station, and (ii) system area registration which is based on location or, more specifically, on the system identification (SID) transmitted in the serving cellular system. Periodic registration may be used to determine whether a mobile station is active (within radio range and switched on) or not in a cellular system. System area registration may be used to determine when a mobile station has crossed the border from one cellular system to another.

Upon receipt of a REGID message on the forward control channel (base station to mobile station), if registration is enabled in the serving cellular system, the mobile station compares the REGID value to the NXTREG value and compares the last received SID value with the value of the SID of the cellular system in which the mobile station last registered. If either the value of REGID is greater or equal to the value of NXTREG indicating that periodic registration is due, or the value of the last received SID is different than the value of the last stored SID indicating that the mobile station has travelled from one cellular system to another since the last successful registration, the mobile station will automatically send a registration access message over the reverse control channel (mobile station to base station) and will update the NXTREG value with the sum of the last received REGID value and REGINCR value, after receipt of a registration acknowledgement message on the forward control channel (the mobile station also updates the NXTREG value after each call origination or page response).

The conventional AMPS system described above uses frequency division multiplexing (FDM) to carry telephone conversations and control information over the voice and control channels. As mentioned, the available frequency spectrum is divided among the cells in the system. In each cell, the voice (analog) signals and data (digital) signals form the input signals to a transmitter (in the base station or the mobile station) which generates a sinusoidal carrier wave having a constant frequency corresponding to one of the frequencies allocated to the cell. The transmitter uses the input signals to modulate a characteristic (amplitude, frequency or phase) of the carrier wave prior to radio transmission. The modulated carrier occupies a relatively narrow region (channel bandwidth) of the spectrum about a nominal center frequency (the unmodulated carrier frequency). Generally, frequency modulation is used so that the carrier frequency at any instant of time is varied (increased or decreased) in proportion to the amplitude of the input signal at that instant. The resulting deviation of the modulated carrier wave frequency about the unmodulated (center) frequency is normally limited within a certain bandwidth, e.g., 30 KHz, to avoid overlapping adjacent RF channels and causing adjacent channel interference.

In the conventional AMPS system, therefore, an analog speech signal modulates the carrier wave used for transmission over the RF channel. The AMPS system uses analog frequency modulation (FM) and is a single-channel-per-carrier (SCPC) system, i.e., one voice circuit (telephone conversation) per RF channel. Recent developments, however, have ushered in a new digital era for cellular communications. The main driving force behind the switch to digital has been the desire to increase spectrum efficiency to meet the ever-increasing demands on system capacity. By encoding (digitizing and compressing) and multiplexing speech from several voice circuits prior to modulation and transmission, a single RF voice channel may be shared by several digital speech channels instead of being occupied by only one analog speech channel. In this manner, the channel capacity and, consequently, the overall system capacity, may be increased dramatically without increasing the bandwidth of the voice channel. As a corollary, the cellular radio system is able to serve a substantially greater number of mobile stations at a significantly lower cost, e.g. , a smaller number of channel units (transceivers) required in the base stations. Furthermore, the digital format facilitates integration of the cellular system with the emerging digital network.

In the United States, the effort to "go digital" has been spearheaded by the Electronics Industries Association (EIA) and the Telecommunication Industry Association (TIA) which have formulated an interim standard for the air interface in digital cellular systems. This EIA/TIA interim standard is known as the "Dual-Mode Mobile Station--Base Station Compatibility Standard" and is designated as "IS-54" (copies of the various revisions of IS-54 may be obtained from the Electronics Industries Association; 2001 Pennsylvania Avenue, N.W.; Washington, D.C. 20006). The term "dual-mode" refers to the capability of the system to operate in either an analog or digital mode. The analog mode of operation draws on the EIA/TIA 553 standard which is based on the AMPS standard. The digital mode of operation relies on time division multiplexing (TDM) techniques similar to those which have long been used in the land-line telephone network to carry multiple telephone conversations simultaneously over one physical channel (code division multiplexing (CDM) has also been proposed for cellular systems, but the current IS-54-B (Rev. B) specification uses TDM).

In the wire-line telephone network, analog speech signals transmitted by local telephone subscribers over separate analog channels to the local telephone company (telco) central office are sequentially sampled and the amplitudes of the samples are quantized and then encoded into binary numbers represented by constant amplitude pulses in a process called pulse code modulation (PCM). A predetermined number of PCM channels (digital speech channels) are transmitted in a series of frames, each containing a burst of information (coded samples) from each of the PCM channels. The bursts from the different PCM channels occupy different time slots (time intervals) in each frame transmitted on the physical channel, e.g. , copper wire plant. Most long-distance telephone calls are transmitted through the switching hierarchy using TDM. This technique can also be applied to transmissions on the RF channels of a cellular radio system.

An RF channel operating in TDM is divided into a series of repeating time slots each containing a burst of information from a different data source, e.g. a source coder for a voice channel. The time slots are grouped into frames of a predetermined duration. The number of time slots per frame varies depending on the number digital channels sought to be accommodated on the RF channel given the coding rates of the digital channels, the modulation level and the bandwidth of the RF channel. Each slot in a frame normally represents a different digital channel. The length of each TDM frame on the RF channel, therefore, is the minimum amount of time between two repeating time slots which are used by the same digital channel (assigned to the same user).. In other words, each TDM frame consists of no more than one s lot for each user.

According to IS-54, each digital TDM RF channel can carry from three to six digital speech channels (three to six telephone conversations) depending on the source rate of the speech coder used for each digital channel (the modulation level and channel bandwidth are set in IS-54). The speech coder for each digital traffic channel (DTC) can operate at either full-rate or half-rate (full-rate speech coders are expected to be used in the near future until half-rate coders are developed which produce acceptable speech quality). A full-rate DTC requires twice as many time slots in a given time period as a half-rate DTC. In IS-54, each TDM RF channel can carry up to three full-rate DTCs or six half-rate DTCs.

The TDM RF channel frame structure for IS-54 is shown in FIG. 3. Each "frame" on the TDM RF channel comprises six equally sized time slots (1-6) and the length of the frame is 40 ms (25 frames per second). Each full-rate DTC uses two equally spaced slots of the frame shown in FIG. 3, i.e. , slots 1 & 4, or slots 2 & 5, or slots 3 & 6. When operating at full-rate, the TDM RF channel may be assigned to three users (A-C), i.e., user A is assigned to slots 1 & 4; user B is assigned to slots 2 & 5; and user C is assigned to slots 3 & 6 of the "frame" shown in FIG. 3 (for full-rate, therefore, each TDM frame actually consists of three slots and not six slots, and is 20 ms long and not 40 ms long). Each half-rate DTC uses one time slot of the frame shown in FIG. 3. At half-rate, the TDM RF channel may be assigned to six users (A-F) with each of the users A-F being assigned to one of the six slots of the frame shown in FIG. 3 ( for half-rate, each TDM frame actually consists of six slots and coincides with the definition of "frame" in IS-54).

Hence, unlike an analog FDM cellular system in which the base station and the mobile station transmit and receive continuously over an RF channel, a TDM cellular system operates in a buffer and burst discontinuous transmission mode. Each mobile station transmits (and receives) in an assigned slot on the RF channel. At full rate, for example, the mobile station of user A would transmit on slot 1, hold for slot 2 receive in slot 3, transmit in slot 4, hold for slot 5, and transmit in slot 6, and then repeat the cycle (the transmit and receive slots are offset from each other to avoid using duplexer circuitry which would otherwise be needed to allow the transmitter and receiver at the mobile station to operate simultaneously). The mobile station, therefore, transmits (or receives ) in a fraction of the time (one third for full rate and one sixth for half-rate) and can be switched off to save power the rest of the time.

The present IS-54 standard, however, is not a fully digital standard but a hybrid analog-digital standard which is intended to be followed in the transition phase from analog to digital where the mobile stations in operation will constitute a mixture of new dual-mode mobile stations and old strictly analog mobile stations. More specifically, the IS-54 standard provides for both analog speech channels in the tradition of AMPS and digital speech channels which are configured in the frame format shown in FIG. 3. At call set-up, the dual -mode mobile stations may be assigned either an analog voice channel (an entire carrier frequency) or, alternatively, a digital traffic channel (a repeating time slot on a carrier frequency). The analog-only mobile stations, however, can only be assigned an analog voice channel.

The continued need to serve existing analog-only mobile stations has also led to the specification in IS-54 of an analog control channel which has been inherited from the prior AMPS, or equivalently, EIA/TIA 553 standard. According to IS-54, the forward (paging) analog control channel on the down-link from the base station to the mobile stations carries a continuous data stream of messages (words) in a particular format. The reverse (access) analog control channel on the up-link from the mobile stations to the base station, however, is a random access channel which is used on a contention basis for transmission of call origination, page response and registration messages. A busy-idle bit transmitted on the forward control channel (FOCC) indicates the current status (availability) of the reverse control channel (RECC), i.e. , the RECC is busy if the busy-idle bit is equal to "0" and idle if the busy-idle bit is equal to "1."

The format of the FOCC specified in IS-54 is shown in FIG. 4. Several different types ( functional classes) of messages may be transmitted on the FOCC: (i) system parameter overhead message (SPOM), (ii) global action overhead message (GAOM), (iii) registration identification message (REGID), (iv) mobile station control message, e.g., paging message, and (v) control-filler message. The SPOM, GOAM and REGID are overhead messages which are intended for use by all mobile stations in the coverage area of the base station. Overhead messages are sent in a group called an overhead message train (OMT). The first message of each OMT must always be the SPOM which is transmitted every 0.8±0.3 seconds.

The SPOM consists of two words which contain information about the serving cellular system including the system identification (SID) and control bits REGH and REGR which indicate whether registration is enabled for home stations and roaming stations, respectively (a home station is a mobile station which is operating in the cellular system from which service is subscribed while a roaming station is a mobile station which is operating in a cellular system other than the one from which service is subscribed). The GOAM or REGID consists of one word which is appended at the end of the SPOM and sent on an as-needed basis. Any number of global action messages may be appended to a SPOM as desired. The types of global action messages include rescan paging channels and registration increment (REGINCR) messages (REGINCR and REGID messages control the frequency of periodic registrations of mobile stations with the serving cellular system). When sent, the REGID message must be appended to the SPOM or, if any global action messages are sent, to the last GOAM in the OMT.

While the SPOM, GOAM and REGID are broadcast for use by all mobile stations listening to the forward control channel (FOCC), the mobile station control message, e.g., paging message, is directed to a specific mobile station (specific MIN). Other examples of mobile station control messages include analog voice channel or digital traffic channel (full-rate or half-rate) assignment messages and orders to change transmit power level. The mobile station control message consists of from one to four words. The control-filler message consists of one word which is sent whenever there is no message to be sent on the FOCC, i.e., to fill gaps between different messages or between blocks of a multi-word message.

The format of the forward analog control channel specified in IS-54 and shown in FIG. 4 is largely inflexible and not conducive to the objectives of modern cellular telephony including the extension of mobile station battery life. Specifically, the time interval between SPOM transmissions is fixed and the order in which overhead and control messages are appended to the SPOM is also rigid. While the cellular system can control the frequency of transmission of most overhead messages (only the SPOM needs to be included in each OMT), an idle mobile station which has tuned to the FOCC must repeatedly read all the messages in each OMT (except, for example, when a GOAM instructs the mobile station to rescan paging channels) not only the paging messages, even though the information contained in the overhead messages in the current OMT may not have changed from the previous OMT. Too often, therefore, the mobile station updates its memory with the same information which is already stored there. Battery power is wasted during these read cycles without any commensurate benefit to the operation of the mobile station.

In light of these drawbacks and shortcomings of the prior art analog control channel (ACC), it is an object of the present invention to provide a digital control channel (DCC) which may carry message types similar to those carried on the ACC, but in which the frequency of message transmission by the base station is mostly decoupled from the frequency of message reading by the mobile station. In other words, some types of messages may be transmitted more frequently than others but the mobile station does not have to read every message transmitted on the DCC.

For example, a mobile station which has just locked on to the DCC may need to obtain, as quickly as possible, all relevant information about the current serving system, e.g., ownership (is it a private system?), service profile (can it handle a particular data service?), system parameters (what is the maximum mobile station transmit power?), etc. This overhead information, therefore, may be sent as often as possible without unduly limiting the capacity of the DCC to carry other messages, e.g., paging messages. However, most of this overhead information does not change very often and it would be a waste of battery power for this information to be read too often. Hence, once the mobile station has read the overhead information, the mobile station will not read it again until the mobile station receives an indication that it has changed. This results in significant savings of battery power in the mobile station.

It is another object of the present invention to provide a DCC which enables a mobile station in idle mode to read a minimum amount of information from the DCC during predetermined periods of time, and to enter into a "sleep" mode at all other times. In this regard, the mobile station is allowed as short of a period as possible to read paging messages before returning to sleep mode. During sleep mode, most electronic circuits in the mobile station are shut off and there is minimal drain of battery power. In this manner, the battery life may be extended from, for example, 13 hours to 100 hours before recharging of the battery becomes necessary. The proportion of time spent reading page messages to the time spent in sleep mode is controllable and represents a tradeoff between call set-up delay and battery power consumption.

It is yet another object of the present invention to provide a flexible DCC format which is adaptable to a hierarchial cell structure consisting of both "macro" (large radius) cells and "micro" (small radius) cells. In a hierarchial cell structure, a mobile station may change cells much more often than in present macro-cell oriented systems. It is important that frequent cell selection and reselection does not hamper the ability of the mobile station to receive pages or place calls. The present invention allows for fast cell selection and reselection by transmitting overhead messages on a frequent basis while still providing for efficient sleep mode operation. The high repetition frequency of overhead messages allows mobile stations which are about to lock onto a new cell to quickly find the paging channel and the other parameters required for system access.

It is a further object of the present invention to provide the ability to adjust DCC capacity in each cell to meet the usage requirements in that cell, i.e. , the expected number of pages and accesses per second.

It is another object of the present invention to provide a DCC which facilitates the integration of the mobile network with the ever-growing portfolio of ISDN services.

It is also an object of the present invention to provide a DCC which may be easily implemented within the existing framework of IS-54.

SUMMARY OF THE INVENTION

The present invention provides a method for transmitting information on a communications channel, e.g. , a digital control channel between a base station and a mobile station in a cellular system. The method includes the steps of grouping the information into a plurality of information elements, providing at least one change flag to indicate whether the value of at least one of the information elements has changed and transmitting the change flag and the information element over the communications channel. The information element is read only if a change is indicated by the change flag. In this manner, the frequency at which information is transmitted is decoupled from the frequency at which the information is read. Hence, the receiver can be turned off for extended periods of time to minimize power consumption.

In another aspect, the present invention provides a method for communicating information over a channel which is divided into a plurality of subchannels. The method includes the steps of transmitting at least one portion of the information in at least one of the subchannels, transmitting at least one change flag in at least one of the subchannels to indicate when the information portion changes, receiving the information portion and the change flag, and reading the information portion in response to an indication in the change flag.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be better understood and its numerous objects and advantages will become apparent to those skilled in the art by reference to the following drawings in which:

FIG. 1 shows the architecture of a conventional cellular radio system;

FIG. 2 shows a three sector cell which may be used in the system shown in FIG. 1;

FIG. 3 shows the channel frame structure for a time division multiplexed (TDM) radio frequency (RF) channel according to a known industry standard;

FIG. 4 shows the format of the forward analog control channel (ACC) specified in this industry standard;

FIG. 5 shows the format of the TDM stream on one RF carrier which can carry at least one digital traffic channel (DTC) according to this standard and the digital control channel (DCC) according to the present invention;

FIG. 6 shows the structure of an exemplary superframe according to the present invention;

FIG. 7 shows the structure of a full-rate DCC in the superframe shown in FIG. 6;

FIG. 8 shows an exemplary format for the overhead information on the DCC of the present invention;

FIG. 9 shows an exemplary logical channel structure for the DCC within a superframe; and

FIG. 10 shows the structure of the BCCH shown in FIG. 9.

DETAILED DESCRIPTION

The main thrust of the present invention is to decouple the overhead message transmission frequency from the requirement that a mobile station read all overhead information. With the digital control channel (DCC) of the present invention, the system can send overhead messages at a sufficiently high frequency to adequately serve the mobile stations which are about to lock onto the DCC without negatively affecting the mobile stations which are already locked onto the DCC.

In the embodiment described herein, the DCC of the present invention uses time division multiplexing (TDM) and, therefore, is configured as a series of time slots of a particular duration (the DCC may also use code division multiplexing but, for purposes of the description herein, TDM is assumed). In general, any suitable slot format may be used to implement the teachings of the present invention. For practical considerations, however, it is preferable to use a DCC format which is compatible with the digital traffic channel (DTC) format defined in IS-54, i.e., equally sized slots each having a duration of 6.66 ms (according to IS-54, three slots span 20 ms). In other words, the basic unit for both the DCC and DTC will be a 6.66 ms slot.

Selection of the IS-54 format for the herein described embodiment of the present invention avoids (i) the technical complexity required for the base stations and mobile stations to handle two different sets of slot formats, source coding rates, and signaling protocols (interleaving, channel coding, synchronization, error detection, etc. ), one set for the DCC and another set for the DTC, and (ii) the necessity of using a separate carrier for the DCC, since both the DTC and the DCC may be provided on the same carrier. The former feature facilitates the rapid development and introduction of IS-54-compatible commercial products (base stations and mobile stations) which operate on the DCC and DTC. The latter feature is particularly important in the context of a small cell which is provided with a small number of carriers or, perhaps, with only one carrier.

Thus, the justification for using a 6.66 ms slot for the DCC lies in compatibility and complexity considerations. To be able to mix DCC and IS-54 DTC slots on the same carrier, the DCC slot duration should not be longer than a DTC slot. From a technical complexity standpoint, the design and testing of mobile stations would be simplified if the DCC slot and the DTC slot are made equal. Absent a compelling need to use a DCC slot which is shorter than the DTC slot, the DCC and DTC slots should have the same duration, i.e., 6.66 ms.

Referring now to FIG. 5, the format of the TDM stream on one carrier which can carry at least one DTC according to IS-54, and the DCC according to the present invention, may now be seen. As explained heretofore, the DTC specified in IS-54 may operate in either full-rate or half-rate. A full-rate DTC occupies one slot every 20 ms (2 slots every 40 ms) while a half-rate DTC occupies one slot every 40 ms. The carrier can carry up to three full-rate DTCs or six half-rate DTCs, or any combination in-between, e.g., one full-rate and four half-rate DTCs.

Like the DTC, the DCC of the present invention may also operate in either full-rate or half-rate (with respect to the DCC, as distinguished from the DTC, the terms "full-rate" and "half-rate" refer to the selected transmission rate rather than the source rate of the speech coders--in general, it may be said that a "full-rate" channel, whether a DCC or a DTC, requires twice as many slots per unit time as a "half-rate" channel). Hence, a number of alternative digital channel (DCC and DTC) combinations are possible within the TDM stream depending on whether the DCC(s) and DTC(s) impressed on the carrier operate in full-rate or half-rate. FIG. 5 shows three alternative digital channel combinations, namely, alternatives X, Y and Z, which may be defined on a certain carrier.

According to alternative X, two full-rate DTCs (DTC1 and DTC2) and one full-rate DCC (DCC1) are time division multiplexed on the carrier. In alternative X, the bursts from DTC1 are transmitted in slots 1, 4, 7, 10 and so on; the bursts from DTC2 are transmitted in slots 2, 5, 8, 11 and so on; and the bursts from DCC1 are transmitted in slots 3, 6, 9, 12 and so on.

According to alternative Y, one full-rate DTC (DTC 1), two half-rate DTCs (DTC3 and DTC4) and one full-rate DCC (DCC1) are time division multiplexed on the carrier. In alternative Y, the bursts from DCC1 are transmitted in slots 1, 4, 7, 10 and so on; the bursts from DTC3 are transmitted in slots 2, 8 and so on; the bursts from DTC1 are transmitted in slots 3, 6, 9, 12 and so on; and the bursts from DTC4 are transmitted in slots 5, 11 and so on.

According to alternative Z, one full-rate DTC (DTC1), three half-rate DTCs (DTC3, DTC4 and DTCS) and one half-rate DCC (DCC2) are time division multiplexed on the carrier. In alternative Z, the bursts from DTC1 are transmitted in slots 1, 4, 7, 10 and so on; the bursts from DCC2 are transmitted in slots 2, 8 and so on; the bursts from DTC3 are transmitted in slots 3, 9 and so on; the bursts from DTC4 are transmitted in slots 5, 11 and so on; and the bursts from DTC5 are transmitted in slots 6, 12 and so on.

As will be readily appreciated by those persons of ordinary skill in the art, the alternatives X, Y and Z shown in FIG. 5 do not exhaust all the possible digital channel combinations which may be defined on any available carrier. In FIG. 5, for example, only one DCC is defined for each of the alternatives X, Y and Z and the other time slots are shown to be fully occupied by DTCs. It will be understood, however, that more than one DCC (full-rate or half-rate) may be defined on the carrier and the status (occupied or vacant) of any remaining time slots depends on whether they are used to define one or more DTCs (full-rate or half-rate) which may be assigned to carry telephone conversations.

In general, the type (full-rate or half-rate) and number of DCCs which are defined on any carrier depends on how much control channel capacity is needed for a particular application. The smallest building block may be considered a half-rate DCC. Hence, one may start by defining a half-rate DCC on an available carrier. If more capacity is needed, a full-rate DCC may be substituted for the half-rate DCC. The next step may be to have one full-rate DCC and one half-rate DCC on the carrier, then two full-rate DCCs followed by the addition of one half-rate DCC, and finally to have three full-rate DCCs on this carrier (at this point, the whole carrier is taken up for control information and there are no more capacity left for digital speech information). If more capacity is still needed, one or more DCCs may be defined on another carrier starting with a half-rate DCC and then proceeding as before.

Returning to FIG. 5, a plurality of consecutive TDM frames according to IS-54 may be grouped into a "superframe" for purposes of the present invention. In general, there does not have to be any particular relationship between a superframe as used in the present invention and a TDM frame as defined in IS-54. In the embodiment of the present invention described herein, however, a DCC slot is configured (sizewise, etc. ) the same as a DTC slot within an IS-54 TDM frame (voice and control information are interleaved on the same carrier). In IS-54, the TDM "frame" consists of six consecutive slots and is 40 ms long. For full-rate operation, however, each user is assigned two slots of the TDM frame, one slot every 20 ms (for half-rate, each user is assigned only one slot of the frame). If a TDM "block" is defined to consist of three contiguous TDM time slots, the first of which coincides with the first or fourth slot of an IS-54 TDM frame (FIG. 3), the superframe will then consist of an integer number of TDM blocks, each of which is 20 ms long.

Referring next to FIG. 6, the structure of an exemplary superframe may now be seen. In general, a superframe may consist of any suitable number of TDM blocks. In FIG. 6, the superframe consists of 50 TDM blocks (150 slots) and, therefore, the length of this superframe is 1 second (=50×20 ms). If one full-rate DCC is used, e.g. , alternatives X or Y in FIG. 5, each such superframe will contain 50 DCC slots, i.e., 50 slots per second on the carrier will be occupied by the DCC. Conversely, if one half-rate DCC is used, e.g. , alternative Z in FIG. 5, each such superframe will contain 25 DCC slots. At least some of the DCC slots in each superframe on the forward DCC will be used for paging mobile stations, i.e. , to notify an idle mobile station of an incoming call.

According to the present invention, each mobile station is assigned one of the DCC slots in each superframe for receiving paging messages. Hence, a superframe may be defined as the time between one DCC slot which is assigned for paging a certain mobile station and the next DCC slot which is assigned for paging the same mobile station. Since there are likely to be a much greater number of mobile stations than there are DCC slots in each superframe, the slot assigned for paging one mobile station may also be used for paging other mobile stations which share some unique characteristic. On a broader level then, a superframe may be defined to be the time between DCC slots which are assigned to the same paging group.

Any one of a number of parameters may be used to distinguish between different groups of mobile stations for paging purposes. I f, for example, the mobile identification number (MIN) is used to differentiate between paging groups, then paging messages to mobile stations having a MIN which ends with the digit "0" may be sent in one DCC slot of each superframe, paging messages to mobile stations having a MIN which ends with the digit "1" may be sent in another DCC slot of each superframe, and so on.

When in idle mode, each mobile station in a particular paging group "wakes up" during one slot of each superframe (locks onto and reads the DCC slot assigned to its paging group), then looks for a paging message addressed to it (determines whether it has received a paging message which includes its MIN) and, if no such message has been received, the mobile station "goes back to sleep" (turns off most internal circuitry to save power). A mobile station which is listening for a paging message on the DCC of the present invention, therefore, is "awake" for only short periods of time and will consume considerably less battery power than a counterpart mobile station which is listening to the prior art analog control channel of IS-54 and continuously reading all control information in search of a paging message addressed to it.

There is a tradeoff, however, between the savings in battery power and the delay in call set-up (the time a caller has to wait before being connected to the mobile subscriber). This tradeoff defines how often each mobile station is required to "wake up" and "look" for a paging message on the DCC or, in other words, how long should each superframe be. For example, if each superframe is one second long (FIG. 6), each mobile station is "awake" for only one slot of the time, a fifty-fold saving in battery usage as compared with a full-rate DTC. In this instance; a call placed to a mobile station will, on average, be delayed for 1/2 of a second and the maximum possible delay will be 1 second (the actual delay in call set-up will depend on when the call was placed relative to when the next paging group slot for paging the mobile station occurs).

Extending the length of the superframe from 1 second to 2 seconds doubles the power savings but increases the average call set-up delay from 1/2 second to a full second. Conversely, reducing the length of the superframe from 1 second to 1/2 second halves the power savings but decreases the average call set-up delay from 1/2 second to 1/4 second. The range of superframes, therefore, encompasses the possibility to either limit the battery drain in the sleep mode by defining a large number of paging groups, i.e. , a long superframe, or to limit the terminating call set-up time by defining a small number of paging groups, i.e. , a short superframe.

Note that the key to balancing the competing goals of conserving battery consumption and constraining call set-up time is the number of paging groups (paging slots) in each superframe and not the number of mobile stations in each paging group. Once the balance has been struck and the number of paging groups determined, an excessive number of mobile stations in any paging group may present a queuing problem. For example, if the length of the superframe is selected to be one second, and the rate of calls to mobile stations in any paging group is greater than one call per second, then some of these calls will be lost or indefinitely delayed in the que. This problem, however, is one of capacity and may be solved by converting from a half-rate DCC to a full-rate DCC or, if necessary, by activating another half-rate or full-rate DCC on the same or a different carrier in the manner and sequence described earlier.

Referring next to FIG. 7, the structure of a full-rate DCC in the superframe shown in FIG. 6 may now be seen. In FIG. 7, the DCC slots have been extracted from the superframe of FIG. 6 and placed next to each other for illustration purposes. The full-rate DCC occupies slots 1, 4, 7, 10 . . . and 148 of the superframe and is configured according to alternative Y in FIG. 5. It should be understood, however, that a full-rate DCC configured according to alternative X in FIG. 5, or a half-rate DCC configured according to alternative Z in FIG. 5, may have been used instead. Several other configurations for either a full-rate or a half-rate DCC on the carrier are also possible as explained in connection with FIG. 5.

With continuing reference to FIG. 7, many of the DCC slots in each superframe will be used for paging, i.e. , assigned to different paging groups. Not all of the DCC slots in each superframe, however, will be paging slots. At least some DCC slots may be used for transmitting overhead information to all mobile stations while other slots may be used for transmitting data packets to specific mobile stations. For example, the first five DCC slots (slots 1, 4, 7, 10 & 13 in FIG. 7) may be used to broadcast overhead information, the next forty DCC slots may be used for paging, and the last five DCC slots of the superframe may be used for packet data. The overhead, paging, and data messages are but one example of the different kinds of information which may be sent on the DCC.

The overhead information which is sent in one or more slots of the DCC comprises information about the serving system and the desired behavior of the mobile station when operating in this system. The overhead information may include, for example, an indication of (i) the paging slot to which a mobile station is assigned, (ii) whether the mobile station is allowed to make and receive any calls through this base station or only emergency calls (restricted calls ), (iii) the power level to be used for transmitting to this base station, (iv) the identity of the system (home system or visited system), (v) whether to use an equalizer or not (an equalizer is used at the receiver to compensate for the distortion and attenuation effects of the radio channel on the transmitted signal), or (vi) the location of DCCs (frequency, time slot, time offset of superframe) of neighboring base stations of which one may be selected if the DCC signal received from this base station is too weak or for some other reason, e.g., the signal form another base station is stronger than the signal from this base station.

According to the present invention, when a mobile station locks onto the DCC, the mobile station will first read the overhead information to determine the system identity, call restrictions, etc., and the location of (i) the DCCs at neighboring base stations (the frequencies, time slots, etc., on which these DCCs may be found) and (i i) the paging slot in the superframe (the DCC slot assigned to the paging group to which the mobile station belongs). The relevant DCC frequencies are stored in memory and the mobile station then enters sleep mode. Once every superframe, e.g., once every second, the mobile station "wakes up" to read the assigned paging slot and then returns to sleep.

During sleep mode, the mobile station is largely inactive but yet has certain tasks to perform. The mobile station, for example, will monitor the signal strength of the relevant DCC frequencies which were earlier stored in memory. To this end, the mobile station may periodically scan through these frequencies and measure the signal power level at each then-tuned-to frequency. Note that the process of measuring the signal strength at any frequency is indifferent as to whether voice or data is being transmitted on that frequency at the time of measurement since the transmit power is the same in all time slots of the frequency.

According to the present invention, if the current DCC signal strength falls below a predetermined level, the mobile station can immediately tune to the best (strongest) of the monitored DCC frequencies or to a DCC which is stronger than the current DCC by a predetermined amount. This is to be distinguished from present-day operation on the analog control channel (ACC) in which a mobile station which "loses" the current control channel has to rescan all of the dedicated control channels in the system (21 channels in the United States) to find the strongest control channel.

Another difference between operation on the DCC of the present invention and operation on the ACC of IS-54 is the reading of overhead messages. According to IS-54, the mobile station continuously reads all overhead messages transmitted in the overhead message train (OMT) on the ACC. According to the present invention, however, the mobile station reads overhead information once when locking on to a DCC and then from time to time but only when the overhead information has changed. This minimizes the amount of overhead information which must be read by a mobile station which, in turn, minimizes the battery drain in the mobile station.

Referring next to FIG. 8, an exemplary format for the overhead information on the DCC may now be seen. The overhead information is divided into different categories-of "information elements" E1, E2, E3, etc. , to which a plurality of associated "change flags" F1, F2, F3, etc, are appended. The information elements comprise different types of overhead messages which may be sent on the DCC. Each change flag represents a pointer to a corresponding information element, i.e. , change flag Fi represents a pointer to information element Ei, where "i" is 1, 2, 3, etc.

Instead of continuously reading the information elements themselves, a mobile station reads at regular intervals the pointers to (the change flags associated with) the information elements. The change flags are transmitted along with the corresponding information elements and the mobile station can then determine from the change flags whether or not to read the information elements. A particular change flag Fi will be set when the value of the corresponding information element Ei has changed. When, and only when, Fi is set, must the mobile station read Ei during sleep mode (if Fi is one bit, for example, Fi may be set to "1" when Ei changes and reset to "0" at all other times). When locking onto a new DCC, the mobile station may be required to read all information elements regardless of the then-current status of the change flags.

Note that the information elements (overhead information) shown in FIG. 8 are repeated at regular intervals to provide the mobile stations, especially those about to lock onto the DCC, with the information required for system access, etc. The actual repetition frequency may be determined by considering how quickly mobile stations need to receive the information in the face of radio channel disturbances (in the prior art analog control channel, for example, the SPOM is transmitted every 0.8 seconds). As well known in the art, certain radio phenomena, e.g., Rayleigh fading, cochannel interference, etc., in the mobile environment may lead to the incorrect decoding of a transmitted message (bit errors). If each type of message is transmitted at a rate higher than the rate at which the contents of the message change, the receiver will have multiple opportunities to correctly decode the contents of each transmitted message (there is a distinction between how often a message is sent and how often the contents of the message change).

In the context of transmissions according to the principle shown in FIG. 8, the Fi (s) and Ei (s) will be repeated with a minimum periodicity, e.g. , once every superframe or once every second if each superframe is one second long. Because of the hostile mobile environment, however, a mobile station may not be able to properly decode the Fi or Ei contained in a particular superframe. If the value of Fi in this superframe was set (Ei has changed), the mobile station will have missed a change in the value of Ei (the Fi in the next superframe (s) will be reset and the mobile station will not attempt to read Ei again until Ei changes again and Fi is set).

To ensure that as many mobile stations as possible are informed of each change in an Ei, the system may keep the value of Fi set for a number of superframes following each superframe in which the value of Ei changes. In this manner, if the mobile station fails to read Ei when it changes, it still has at least one more chance to read the new value of Ei. While this technique ameliorates the threat of missing a new Ei value due to failed decoding, it may cause the mobile station to repeatedly read the new value of Ei leading to an unnecessary waste of battery power during sleep mode operation. By proper configuration of the change flags, however, this undesirable effect can be avoided.

According to the present invention, each change flag Fi may consist of two bits. The value "00" for Fi may be used, for example, to indicate to the mobile station that information element Ei has not changed and there is no need to read Ei. Conversely, the value "01" for Fi may be used to indicate to the mobile station that information element Ei has changed and needs to be read. The value "11" for Fi, on the other hand, may be used to indicate a conditional read, i.e. , the mobile station should read Ei only if the mobile station missed (could not properly decode) the Fi in the previous superframe. The change flag Fi is set to "11" in a predetermined number of superframes following a superframe in which this Fi was set to "01". The following table illustrates the action to be taken by the mobile station based on the value of Fi in the previous and current superframes (an "X" in either Fi column means that Fi was missed):

______________________________________Previous Fi  Current Fi                  Read Current Ei______________________________________00           00        No01           00        No11           00        NoX            00        No00           01        Yes01           01        Yes11           01        YesX            01        Yes00           11        System Error01           11        No11           11        NoX            11        YesX            X         X______________________________________

As illustrated in the table above, regardless of the value of the previous Fi, the mobile station never reads the current Ei if the value of the current Fi is "00" and always reads the current Ei if the value of current Fi is "01." This is analogous to having a one-bit change flag which is reset to "0" to indicate a "no read" and set to "1" to indicate a "read" where each Ei and Fi are transmitted only once. Where the value of Ei in a superframe has changed, the value of Fi in at least one subsequent superframe will be "11" and the mobile station will not read Ei again. If the mobile station misses reading the value of the previous Fi and the value of the current Fi is "11," the mobile station will read the current Ei in order to account for the possibility that the value of the missed Fi was "01."

In general, the management of the change flags may be controlled by the system operator subject to one condition. If the value of the previous Fi is "00," the value of the current Fi should not be "11." This sequence presents an inherent contradiction since "00" for the previous Fi indicates that the previous Ei has not changed while "11" for the current Fi indicates that the previous Ei did change (hence the designation "system error"). Apart from this anomaly, the operator retains substantial flexibility. In the table above, for example, the value "01" for the previous Fi is shown to be followed by any of the values "00," "01" or "11" for the current Fi. In general, it is preferable that a conditional read always follow a read, i.e. , the Fi value "11" always follows the Fi value "01," in order to minimize battery drain. If, however, the current Fi value is "00" or "01" and the previous Fi value is "01" (and "01" represents a new change of Ei), this would only mean that the mobile station only has one chance to properly decode the change in Ei value indicated by the previous Fi.

In practice, it may not be feasible or even technically possible for the mobile station to read only one information element Ei or one change flag Fi separately form other Ei (s) or Fi (s) since it is more practical to group a plurality of information elements or a plurality of change flags together for purposes of channel coding, including error detection (CRC) coding. Thus, in practice, a set of information elements or change flags may be the minimum readable unit.

Giving due consideration to the compatibility and complexity issues referred to earlier in connection with the slot format on the DCC, the minimum portion of time for a mobile station to be active (reading) should preferably be equal to the duration of one DTC slot. The change flags, therefore, may be transmitted in the first DCC slot (referred to hereinafter as the FBCCH) at the beginning of each superframe and the information elements may be transmitted in the remaining portions of that first slot and in a given number of subsequent DCC slots (referred to hereinafter as the SBCCH and EBCCH) in the superframe.

The first DCC slot (FBCCH), which contains the change flags, may be read by the mobile stations often enough to allow the system operator to dynamically adjust the configuration of the system, e.g., access control parameters for mobile stations about to lock onto the DCC, by changing the information carried in the other DCC slots (SBCCH). For mobiles already locked to the DCC, the FBCCH controls whether the other slots (SBCCH and EBCCH) should be read.

The use of change flags to minimize the amount of overhead information which has to be read by a mobile station, without more, achieves the desired objective of limiting battery drain. The present invention, in addition, provides a technique for maximizing the efficient use of the DCC by transmitting different categories of overhead information at different rates. In principle, all categories of overhead information may be sent at the same rate without undermining in the least the objective of limiting battery drain since, even if all overhead information is sent at the same rate, the mobile station only reads the change flags and not the detailed information elements (unless they have changed).

In general, the rate of transmission of overhead information should be sufficient to keep the mobile stations updated with the latest overhead information, especially for those mobile stations about to lock on to the DCC. This could be accomplished by transmitting all overhead information at the rate at which the most frequently updated overhead information should be sent. There is no requirement, however, for sending all overhead information at this high rate. In fact, to do so would waste DCC capacity since some categories of overhead information change less often than other more dynamic categories and, therefore, can be sent at a slower rate without rendering any of the overhead information "stale." For efficient capacity utilization, then, the categories of overhead information which are frequently updated should be transmitted relatively often so that the mobile station is continuously updated, but other categories which are more stable should be transmitted less often.

Referring next to FIG. 9, an exemplary logical channel structure for the DCC within a superframe may now be seen. In FIG. 9, the DCC slots shown in the superframe of FIG. 7 have been allocated to a set of logical channels. On the forward DCC, this set includes a broadcast control channel (BCCH), at least one paging channel (PCH), a single cell control channel (SCCH) and at least one user packet channel (UPCH). Every time slot on the reverse DCC, however, may be a random access channel (RCH).

Each logical channel transports information streams which have certain common characteristics or which are of a similar type. A logical channel may be characterized according to its distribution path (point-to-point or point-to-multipoint) and direction of transmission (unidirectional or bidirectional). The BCCH is a unidirectional, point-to-multipoint channel which carries overhead information enabling the mobile stations, for example, to identify the system and the control and paging channels. The types of overhead information carried on the BCCH of the DCC correspond, to some extent, to the types of overhead messages sent in the OMT on the analog control channel (ACC), e.g. , SPOM, GOAM and REGID.

In general, each superframe will contain several paging channels which are assigned to different paging groups. Each PCH is a unidirectional channel which carries paging messages specifically directed to an individual mobile station or a group of mobile stations, e.g., a fleet of trucks. Each SCCH (there may be several) is a bidirectional, point-to-point which is used for controlling individual mobile stations in a single cell. The UPCH is not a control channel in the strict sense of the term but is actually a traffic channel which may be used for transmission of packetized (asynchronous) data to individual users. Finally, the RCH is a unidirectional, point-to-point channel which is used for transmitting call originations, page responses and registration messages from an individual mobile station. Replies to the mobile station may be returned via the SCCH.

The logical channel structure (the particular set of logical channels) and the locations of the logical channels within the superframe shown in FIG. 9 are exemplary only and are not intended to encompass the vast range of possible sets of logical channels and corresponding channel locations within the superframe. The "least common denominator" between the various possible sets of logical channels on the forward DCC may perhaps be the BCCH and PCH(s). The twin goals of limiting battery drain and efficiently using the capacity of the DCC are met if, as described before, each PCH occupies a particular slot in each superframe which is assigned to a particular paging group. A structure for the BCCH which advances these goals is shown in FIG. 10.

Referring next to FIG. 10, the structure of the BCCH shown in FIG. 9 may now be seen. In designing the structure of the BCCH, three major considerations must be taken into account: (i) efficiency, (ii) speed of system access and (iii) portable battery economy. Careful examination of the classes of messages which need to be sent on the BCCH leads to a design in which different classes of BCCH are defined. These BCCH classes may be defined with reference to the rate at which the information they carry needs to be read by a mobile station.

Several different kinds of information may be carried on the BCCH. For example, the BCCH may carry the following categories of information: (i) random access control parameters and authentication parameters (authentication is the process by which the system verifies the validity of the mobile station or vice versa), (ii) messages of general interest to the end user (for example, information about a traffic accident in the vicinity of the mobile subscriber), (iii) the presence, location (frequency, time slot, etc. ) and certain characteristics of the DCCs of neighboring cells, and (iv) serving system and cell identification and their service capabilities.

The rate at which the information contents change is the highest for category "(i)" messages and the lowest for category "(iv)" messages. In other words, the rate of change generally decreases in ascending order from category "(i)" to category "(iv)." Moreover, the length of messages may vary between categories. For example, category "(ii)" messages may be quite long (several words as defined in IS-54) but they are sent sporadically. Hence, not only will the information elements in the different categories change at different rates, but also the amount of information to be transmitted over the BCCH could vary over time in an unpredictable fashion. Provision must then be made in the BCCH for different types of messages whose contents vary at different rates and which are of different lengths.

On the forward DCC, there is the BCCH, the PCHs and possibly other types of logical channels as shown in FIG. 9. A superframe on the forward DCC may be defined as the repetition time from one BCCH to the next BCCH or from one PCH to the next PCH assigned to the same paging group. Each PCH will generally carry only one type of messages, i.e., paging messages, and is preferably assigned only one slot in each superframe to minimize battery drain. The BCCH, on the other hand, may carry different types of messages of different lengths and may be assigned either a fixed number of slots in each superframe or a dynamic number of slots which changes from one superframe to another depending on instantaneous capacity needs, i.e., the number and length of BCCH messages to be transmitted at any time.

At least two considerations support the allocation of a fixed rather than a dynamic number of slots to the BCCH in each superframe. First, changing the number of BCCH slots from one superframe to another complicates the operation of the mobile station when reading the BCCH slots (the mobile station would be required to constantly determine which slots in each superframe are allocated to the BCCH). Second, a dynamic allocation of BCCH slots would result in a waist of PCH capacity since either a large number of slots would have to be reserved for BCCH in every superframe to deal with the worst case scenario (the longest possible BCCH message) leaving less slots for the PCHs in the superframe or, alternatively, a small number of slots is reserved in each superframe in which case the adjoining PCH slots would have to be discarded whenever a long BCCH message needs to be transmitted.

To avoid wasting PCH capacity if dynamic BCCH slot allocation is chosen, a small number of slots could be reserved for the BCCH and the mobile stations assigned to adjoining PCH slots could be reassigned to other PCH slots in the superframe whenever a long BCCH message has to be transmitted. Changing the number of PCH slots (paging groups)in the superframe, however, would require the affected mobile stations to be awakened for reassignment during sleep mode which contradicts the goal of limiting battery drain. Hence, dynamic BCCH slot allocation would have to be designed for the worst case situation in which event the BCCH slots would most often (at all times other than when a long message has to be transmitted) be filled with wasteful control filler rather than useful control information.

In sum, allocation of a fixed number of slots for the BCCH in each superframe is preferred over a dynamic allocation. The actual number of BCCH slots in each superframe may be selected by the cellular operator to meet the needs of the application (the selected number of BCCH slots will be conveyed to the mobile station over the DCC). Regardless of how many slots per superframe are us ed for the BCCH, however, the mobile station should be required to read as little BCCH information (slots) as possible during sleep mode to minimize battery drain. For this purpose, the BCCH may be organized into a plurality of information elements and their associated change flags as shown in FIG. 8.

The change flags may be inserted in a portion of the BCCH which i s read by a mobile station with some minimum frequency, e.g. , once every superframe or once every second. Because this portion is frequently read by the mobile station, it should be as small as possible for efficient sleep mode operation. In general, this portion may be any unit of time which is less than or equal to a slot in length. To simplify the reading by the mobile station, however, this portion may be made equal to one BCCH slot, called the "fast" BCCH (FBCCH), which is repeated once in every superframe. The information elements may be inserted in any part of the FBCCH not occupied by the change flags and in subsequent BCCH slots. These subsequent slots may be contiguous to, or remote from, the FBCCH and may be organized into one or more logical channels.

Considering the spectrum of different categories of information, the FBCCH which is read often may be used to transmit information which is frequently updated. To avoid repetitive reading of information which is not frequently updated, this information may be transmitted in other BCCH channels. The mobile station may obtain from the FBCCH both the change flags and information about the location of these other BCCH channels in the superframe (how many slots are assigned to them, their starting positions, etc.). The FBCCH, therefore, may indicate not only when, but also where to read the information elements.

Some information will have to be transmitted in every superframe to allow a mobile station to read other information in the superframe, or to quickly find the best serving cell, when first locking onto a DCC. For example, certain basic information about the low-layer structure of the DCC will have to be read by a mobile station before any other information in the superframe can be read. This basic information may include, for example, the superframe start indicator, the superframe period (number of DCC slots), whether the DCC is half-rate or full-rate, the DCC format (which slot 1, 2 or 3 in a TDM block), the location of other BCCH channels, the location of the assigned PCH, and whether the mobile station receiver should use an equalizer. Other types of information should also be sent rather often so that a mobile station can quickly accept or reject a particular DCC. For example, information about the availability and data capability of a cell (the cell may be available only to a closed user group or may not be capable of handling data transmissions from a mobile station), the identity of the system and the cell, etc., may need to be sent in every superframe.

In general, at least some of the information required for system access may be sent in the FBCCH which is read in every superframe (assuming there is enough space left in FBCCH after inserting the change flags). This allows mobile stations which are locking onto a DCC to quickly find the information needed, for example, to receive or place a call. Having locked onto a DCC, however, the mobile station will need not to read this information again unless it changes. For efficient sleep mode operation, therefore, most if not all such information may be sent not in the FBCCH but in another subchannel of the BCCH called the "slow" BCCH (SBCCH). Like the FBCCH, the SBCCH is repeated with a minimum periodicity, e.g. , every superframe, and is assigned a fixed number of slots in each superframe (the number and location of slots in the SBCCH may be indicated in the FBCCH). Unlike the FBCCH, however, the SBCCH is not read every time it is sent but read only when the associated change flags in the FBCCH are set (except that the SBCCH may be read once prior to system access).

When locking onto a DCC, the mobile station may automatically read the SBCCH. If each superframe is one second long, the mobile station, on average, will have to wait half a second to read the information in the SBCCH. In the radio environment, however, where cochannel interference and Rayleigh fading may cause bit errors in the first few received superframes, or where the mobile station is unable to synchronize immediately to the first received superframe but synchronizes to a subsequent frame, the true average waiting time to read (decode) the SBCCH may actually be longer than half a second. Having locked onto the DCC and read the information elements in the SBCCH once, however, the mobile station will not read any of them again until required to do so by the corresponding change flags in the FBCCH.

The FBCCH and SBCCH discussed thus far use a relatively small number of slots per superframe and serve to accommodate the desire for efficient sleep mode operation and fast cell selection (the number of slots in each of the FBCCH and SBCCH is fixed but system controlled). A mechanism is still needed to send long overhead messages over the BCCH. For this purpose, a third BCCH channel, called the "extended" BCCH (EBCCH), is introduced.

The EBCCH is also assigned a system controlled fixed number of slots per superframe but a long message sent on the EBCCH may extend (span) over several superframes and, hence, the number EBCCH slots in each superframe can be much less than the number of slots needed to carry the long message. In other words, the number of EBCCH slots in each superframe is fixed regardless of message length. If there are not enough EBCCH slots in a superframe to accommodate all EBCCH messages, subsequent superframes are used. Mobile stations may be notified through the FBCCH or SBCCH of the number and location of EBCCH slots assigned per superframe. A start of EBCCH marker may be sent in the current FBCCH or SBCCH to inform the mobile stations that the current superframe contains the start of an EBCCH message.

With the EBCCH, long and/or sporadic information may be sent on the DCC without jeopardizing the organization of the superframe, e.g. , PCH assignments, or the DCC capacity. For example, the list of DCCs of neighboring base stations may be sent on the EBCCH. The information contained in this list is rather large and requires several slots which, instead of taking up a large portion of one superframe, may be spread out over the EBCCH of several superframes.

According to the present invention, therefore, the BCCH is partitioned into three logical subchannels, namely, the FBCCH, SBCCH and EBCCH, at least two of which (SBCCH and EBCCH) may be used to transmit different categories of information. In general, the SBCCH carries messages of predictable or predefined length. The EBCCH provides the added flexibility for sending variable length messages. The FBCCH, SBCCH and EBCCH may be consecutive blocks in a superframe.

The FBCCH contains change flags which inform the mobile station whether to read the information elements in the SBCCH and the EBCCH. Alternatively, the FBCCH may contain change flags for the information elements in the SBCCH and the SBCCH may contain change flags for the information elements in the EBCCH. The mobile station reads the FBCCH with a minimum periodicity. The SBCCH may be read at least once before making access to the system. The EBCCH may also be read at least once. When locking onto a DCC, the mobile station may read all of the information in the FBCCH, SBCCH and EBCCH. Once locked to the DCC, the mobile station reads only the FBCCH and the as signed PCH in every frame during sleep mode unless the change flags indicate that the mobile station should also read the information elements in the SBCCH and/or the EBCCH.

It should be pointed out, that the location of the change flags may be varied in different applications. For example, the change flags for the SBCCH (and possibly also the EBCCH) may be placed in the assigned PCH, in which case the mobile station may read only the assigned PCH during sleep mode operation instead of reading both the FBCCH and the assigned PCH (the change flags for the EBCCH may be placed in the assigned PCH or in the SBCCH). In fact, the FBCCH may be eliminated altogether or, if the FBCCH is retained, the PCH may contain change flags for the information elements in the FBCCH in addition to the SBCCH (and possibly also the EBCCH). In yet another variation, copies of the flags for the SBCCH (and possibly also the EBCCH) may be placed in both the FBCCH and assigned PCH. The latter approach may have merit for mobile stations not currently assigned to a PCH, e.g., a mobile station operating on the UPCH.

It should be further pointed out that, because of the way in which messages may be formatted over the DCC, a mobile station may not be able to read any one information element (Ei) independently of all other information elements but may have to read, at a minimum, a set of information elements which have been grouped and coded together and then inserted into one of the slots of the FBCCH, SBCCH or EBCCH. In this case, each of the changes flags will point not to an individual information element but instead to a set of information elements which may occupy a part or the whole of one FBCCH, SBCCH or EBCCH slot, or even the entire FBCCH, SBCCH and/or EBCCH channel, e.g., all the BCCH. Depending on message formatting, therefore, a change flag may signal whether or not the mobile station should read a single information element, a set of information elements, an entire slot or the whole FBCCH, SBCCH and/or EBCCH, as applicable.

In the embodiment (s) of the present invention discussed in detail herein, certain slot, frame, superframe and channel formats are used. However, the teachings of the present invention are equally applicable-to other formats which may be used by persons of ordinary skill. In addition, the cellular radio system of the embodiment described herein utilizes time division multiplexing (TDM) techniques. It should be clearly understood, however, that the teachings of the present invention, e.g. , the pointer technique (change flags) and the partitioning of the overhead information (BCCH), apply with equal force to any wireless communication system including, without limitation, a cellular radio system which uses frequency division multiplexing (FDM) or code division multiplexing (CDM) techniques.

The foregoing detailed description, therefore, shows only certain particular embodiments of the present invention. However, those skilled in the art will recognize that many modifications and variations may be made without departing substantially from the spirit and scope of the present invention as discussed and illustrated herein. Accordingly, it should be clearly understood that the form of the invention described herein is exemplary only and is not intended to limit, in any way, the scope of the invention as defined in the following claims.

Claims (55)

What is claimed is:
1. A method for transmitting at a transmitter and receiving at a receiver information which changes from time to time and which is transmitted at regular intervals comprising the steps of:
transmitting along with each transmission of said information from said transmitter an indication of whether said information has changed, said indication being set to any one of first, second and third values, said first value indicating that said information has not changed and should not be read, said second value indicating that said information has changed and should be read, and said third value being transmitted a predetermined number of times after said second value is transmitted to indicate that said information should be read only if it has not been read since said second value was transmitted; and
reading said information at said receiver as indicated by said values.
2. The method of claim 1 wherein said transmitter comprises a base station, said receiver comprises a mobile station and said information comprises overhead information.
3. The method of claim 2 wherein said base station transmits said overhead information to said mobile station over a digital control channel.
4. A method for communicating information over a digital control channel (DCC) divided into a plurality of channels including a broadcast control channel (BCCH) and a paging channel (PCH) comprising the steps of:
dividing said BCCH into a plurality of subchannels for transmitting different portions of said information;
transmitting at least one portion of said information in at least one of said BCCH subchannels;
transmitting at least one change flag in at least one of said PCH and said BCCH subchannels to indicate when said at least one information portion changes;
receiving said at least one change flag; and
reading said at least one information portion in response to an indication in said at least one change flag.
5. The method of claim 4 wherein said BCCH subchannels comprise:
a fast broadcast control channel (FBCCH);
a slow broadcast control channel (SBCCH); and
an extended broadcast control channel (EBCCH).
6. The method of claim 5 wherein:
a first information portion is transmitted in said SBCCH;
a second information portion is transmitted in said EBCCH; and
first and second change flags are transmitted in said FBCCH to indicate when said first and second information portions, respectively, change.
7. The method of claim 5 wherein:
a first information portion is transmitted in said SBCCH;
a second information portion is transmitted in said EBCCH;
a first change flag is transmitted in said FBCCH to indicate when said first information portion changes; and
a second change flag is transmitted in said SBCCH to indicate when said second information portion changes.
8. The method of claim 5 wherein said information is communicated over said DCC in a series of superframes, each including a plurality of time slots, and wherein:
said FBCCH occupies one time slot in each said superframe;
said SBCCH occupies a first predetermined number of time slots in each said superframe; and
said EBCCH occupies a second predetermined number of time slots in each said superframe.
9. The method of claim 8 wherein said at least one information portion comprises at least one data message which is transmitted in the EBCCH over a plurality of consecutive superframes.
10. The method of claim 8 wherein said PCH occupies one time slot in each superframe.
11. The method of claim 5 wherein:
a first information portion is transmitted in said SBCCH;
a second information portion is transmitted in said EBCCH; and
first and second change flags are transmitted in said PCH to indicate when said first and second information portions, respectively, change.
12. The method of claim 5 wherein:
a first information portion is transmitted in said SBCCH;
a second information portion is transmitted in said EBCCH;
a first change flag is transmitted in said PCH to indicate when said first information portion changes; and
a second change flag is transmitted in said SBCCH to indicate when said second information portion changes.
13. The method of claim 5 wherein:
a first information portion is transmitted in said SBCCH;
a second information portion is transmitted in said EBCCH; and
first and second change flags are transmitted in each of said FBCCH and said PCH to indicate when said first and second information portions, respectively, change.
14. The method of claim 4 wherein said BCCH subchannels comprise:
a fast broadcast control channel (FBCCH); and
an extended broadcast control channel (EBCCH).
15. The method of claim 4 wherein said BCCH subchannels comprise:
a slow broadcast control channel (SBCCH); and
an extended broadcast control channel (EBCCH).
16. A method for receiving at a mobile station overhead information comprised of a plurality of overhead information elements transmitted during predetermined time intervals, each of said information elements being associated with a change of value indication also transmitted to said mobile station, comprising the steps of:
reading the overhead information elements contained in at least the first interval;
reading an element of the overhead information contained in at least one interval subsequent to said at least first interval in response to the receipt of an indication that the value of said overhead information element has changed; and
placing said mobile station in a sleep mode during at least a portion of the time when said mobile station is not reading said overhead information elements.
17. The method of claim 16 wherein said overhead information is transmitted in at least one of a plurality of repetitive time slots.
18. The method of claim 17 wherein paging information is transmitted to said mobile station in at least one other repetitive time slot and said mobile station is placed in said sleep mode during at least some of the time slots when it is not reading either said overhead or said paging information.
19. The method of claim 16 wherein said overhead information includes an indication of the transmit power level to be used by said mobile station.
20. The method of claim 16 wherein said overhead information includes an identification of the system which is transmitting said overhead information to said mobile station.
21. The method of claim 16 wherein said overhead information is received over a digital control channel (DCC) and said overhead information includes an identification of at least one other DCC capable of being received by said mobile station.
22. The method of claim 21 further comprising the step of monitoring during said sleep mode the signal strength of said at least one other DCC.
23. The method of claim 16 wherein said overhead information element and said change indication are repeated in a plurality of time intervals.
24. The method of claim 23 wherein said change indication is set to a first value in the time interval in which the value of said overhead information element changed, and set to a second value in at least one succeeding time interval in which said overhead information element and said change indication are repeated, said second value indicating that said mobile station should read said overhead information element only if it failed to correctly receive the changed value of said information element in a preceding time interval.
25. The method of claim 16 wherein said overhead information element comprises a message transmitted to said mobile station from a base station in a cellular radio communications system.
26. In a radio communications system operating on a digital control channel (DCC) which is divided into a plurality of time slots, said time slots being grouped into a series of superframes, a method for transmitting a plurality of information elements having changeable values over said DCC comprising the steps of:
dividing said information elements into a plurality of groups each including at least one information element;
assigning to each of said groups a change flag indicating whether the value of any of its constituent information elements has changed; and
transmitting said groups and said assigned change flags in at least one of said time slots in said superframes.
27. The method of claim 26 wherein said assigned change flags are transmitted in the first slot of said superframes and said groups of information elements are transmitted in at least one of the other slots of said superframes.
28. The method of claim 26 wherein a mobile station receives said assigned change flags and reads a group of information elements if its assigned change flag indicates a change in the value of any of its constituent information elements.
29. A method of transmitting a plurality of messages over a digital control channel (DCC) comprising the steps of:
dividing the DCC into a plurality of channels including a broadcast control channel (BCCH) and a paging channel (PCH);
grouping the messages into the first and second categories, said first category comprising messages to be transmitted at a first rate over the BCCH and said second category comprising messages to be transmitted at a second rate over the BCCH; and
dividing the BCCH into first and second subchannels, said first subchannel being used for transmitting messages in said first category at said first rate and said second subchannel being used for transmitting messages in said second category at said second rate.
30. The method of claim 26 wherein information for enabling reception of said second subchannel is transmitted in said first subchannel.
31. The method of claim 26 wherein said BCCH comprises a plurality of time slots repeated in a series of superframes and said first and second subchannels comprise different time slots in each superframe.
32. The method of claim 26 wherein at least one change flag is transmitted in said first subchannel to indicate whether the contents of at least one of the messages transmitted in said second subchannel have changed.
33. The method of claim 32 wherein said BCCH is received by a mobile station which reads the messages transmitted in said second subchannel if said at least one change flag indicates a change.
34. The method of claim 33 wherein at least some of the information required for system access by said mobile station is included in messages transmitted in said first subchannel.
35. The method of claim 32 wherein said first subchannel comprises a fast BCCH (FBCCH) and said second subchannel comprises a slow BCCH (SBCCH).
36. The method of claim 32 wherein said first subchannel comprises a fast BCCH (FBCCH) and said second subchannel comprises an extended BCCH (EBCCH).
37. The method of claim 32 wherein said first subchannel comprises a slow BCCH (SBCCH) and said second subchannel comprises an extended BCCH (EBCCH).
38. The method of claim 32 wherein said first subchannel comprises a fast BCCH (FBCCH) and a slow BCCH (SBCCH) and said second subchannel comprises an extended BCCH (EBCCH).
39. The method of claim 32 wherein said first subchannel comprises a fast BCCH (FBCCH) and said second subchannel comprises a slow BCCH (SBCCH) and an extended BCCH (EBCCH).
40. In a radio communications system using a digital control channel (DCC) comprised of a broadcast control channel (BCCH) for transmitting broadcast information and a paging channel (PCH) for transmitting paging information, a method for transmitting the broadcast information over the BCCH comprising the steps of:
dividing the BCCH into a plurality of subchannels for transmitting a plurality of different types of broadcast information; and
transmitting in the PCH at least one flag which indicates whether there is a change in at least a portion of the broadcast information transmitted in one of the BCCH subchannels.
41. The method of claim 40 wherein said subchannels include an extended BCCH (EBCCH) and said at least one flag in the PCH comprises a flag which indicates whether there is a change in at least a portion of the broadcast information transmitted in said EBCCH.
42. The method of claim 41 wherein:
the broadcast information transmitted in said EBCCH comprises a plurality of messages;
said EBCCH occupies at least one repetitive time slot in a train of superframes; and
at least one of said messages is transmitted in said EBCCH over a plurality of consecutive superframes.
43. The method of claim 42 wherein:
said subchannels further include a fast BCCH (FBCCH) and a slow BCCH (SBCCH), each of which occupies at least one other time slot in each superframe; and
information for determining the location of said EBCCH in each superframe is transmitted in said FBCCH or said SBCCH,
44. The method of claim 41 wherein said subchannels further include a fast BCCH (FBCCH) and said at least one flag in the PCH further comprises a flag which indicates whether there is a change in at least a portion of the broadcast information transmitted in said FBCCH.
45. The method of claim 41 wherein said subchannels further include a slow BCCH (SBCCH) and said at least one flag in the PCH further comprises a flag which indicates whether there is a change in at least a portion of the broadcast information transmitted in said SBCCH.
46. The method of claim 40 wherein said BCCH comprises first and second subchannels and said at least one flag in the PCH comprises first and second flags, said first flag indicating whether there is a change in at least a portion of the broadcast information transmitted in said first subchannel and said second flag indicating whether there is a change in at least a portion of the broadcast information transmitted in said second subchannel.
47. The method of claim 46 wherein said second flag is also transmitted in said first subchannel.
48. A method for transmitting changeable information in a broadcast control channel (BCCH) comprising the steps of:
dividing the BCCH into a plurality of subchannels including first and second subchannels;
transmitting a first portion of the information in said first subchannel and a second portion of the information in said second subchannel; and
transmitting in said first subchannel an indication of whether said second portion of information has changed.
49. The method of claim 48 wherein said first subchannel comprises a fast BCCH (FBCCH).
50. The method of claim 48 wherein said second subchannel comprises a slow BCCH (SBCCH).
51. The method of claim 48 wherein said second subchannel comprises an extended BCCH (EBCCH).
52. The method of claim 48 wherein said first subchannel comprises a fast BCCH (FBCCH) and said second subchannel comprises a slow BCCH (SBCCH).
53. The method of claim 48 wherein said first subchannel comprises a fast BCCH (FBCCH) and said second subchannel comprises an extended BCCH (EBCCH).
54. The method of claim 48 wherein said first subchannel comprises a slow BCCH (SBCCH) and said second subchannel comprises an extended BCCH (EBCCH).
55. The method of claim 54 wherein said BCCH subchannels further comprise a fast broadcast control channel (FBCCH).
US07956640 1992-10-05 1992-10-05 Method for transmitting broadcast information in a digital control channel Expired - Lifetime US5404355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US07956640 US5404355A (en) 1992-10-05 1992-10-05 Method for transmitting broadcast information in a digital control channel

Applications Claiming Priority (13)

Application Number Priority Date Filing Date Title
US07956640 US5404355A (en) 1992-10-05 1992-10-05 Method for transmitting broadcast information in a digital control channel
GB9406728A GB2275592B (en) 1992-10-05 1993-09-03 Digital control channel
KR19947001477A KR100270032B1 (en) 1992-10-05 1993-09-03 Digital control channel
RU94033147A RU2149518C1 (en) 1992-10-05 1993-09-03 Process of transmission of broadcast information
GB9612697A GB2300337B (en) 1992-10-05 1993-09-03 Digital control channel
PCT/US1993/008363 WO1994008432A1 (en) 1992-10-05 1993-09-03 Digital control channel
CA 2120600 CA2120600C (en) 1992-10-05 1993-09-03 Method for transmitting broadcast information in a digital control channel
CN 93118245 CN1053782C (en) 1992-10-05 1993-10-05 Method for transmitting broadcasting signal in digital control channel
US08331703 US5604744A (en) 1992-10-05 1994-10-31 Digital control channels having logical channels for multiple access radiocommunication
US08482754 US5768276A (en) 1992-10-05 1995-06-07 Digital control channels having logical channels supporting broadcast SMS
US08785773 US6212176B1 (en) 1992-10-05 1997-01-21 Digital control channels having logical channels for multiple access radiocommunication
US09075203 US6041047A (en) 1992-10-05 1998-05-11 Digital control channels having logical channels supporting broadcast SMS
US09480258 US6252868B1 (en) 1992-10-05 2000-01-11 Digital control channels having logical channels supporting broadcast SMS

Related Child Applications (3)

Application Number Title Priority Date Filing Date
US08147254 Continuation-In-Part US5603081A (en) 1993-11-01 1993-11-01 Method for communicating in a wireless communication system
US08331703 Continuation-In-Part US5604744A (en) 1992-10-05 1994-10-31 Digital control channels having logical channels for multiple access radiocommunication
US09075203 Continuation-In-Part US6041047A (en) 1992-10-05 1998-05-11 Digital control channels having logical channels supporting broadcast SMS

Publications (1)

Publication Number Publication Date
US5404355A true US5404355A (en) 1995-04-04

Family

ID=25498479

Family Applications (1)

Application Number Title Priority Date Filing Date
US07956640 Expired - Lifetime US5404355A (en) 1992-10-05 1992-10-05 Method for transmitting broadcast information in a digital control channel

Country Status (7)

Country Link
US (1) US5404355A (en)
KR (1) KR100270032B1 (en)
CN (1) CN1053782C (en)
CA (1) CA2120600C (en)
GB (1) GB2275592B (en)
RU (1) RU2149518C1 (en)
WO (1) WO1994008432A1 (en)

Cited By (192)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5535423A (en) * 1993-05-28 1996-07-09 Societe Anonyme Dite Alcatel Radiotelephone Method of exchanging data between a base transceiver station of a mobile radio network and a mobile in the network
US5546464A (en) * 1994-09-16 1996-08-13 Ericsson Inc. Method of and apparatus for selective resynchronization in a digital cellular communications system
WO1996031956A1 (en) * 1995-04-07 1996-10-10 Motorola Inc. Method and apparatus for receiving a radio signal within a home control channel in a multichannel radio communication system
US5574728A (en) * 1995-06-27 1996-11-12 Motorola, Inc. Methods of terminal registration
US5604921A (en) * 1995-07-07 1997-02-18 Nokia Mobile Phones Ltd. Radiotelephone user interface for broadcast short message service
WO1997015167A1 (en) * 1995-10-18 1997-04-24 Telefonaktiebolaget Lm Ericsson A method for paging mobile stations
US5625629A (en) * 1995-08-07 1997-04-29 Hughes Electronics Method of ensuring bandwidth availability for non-page traffic in a communications systems
WO1997020446A2 (en) * 1995-11-29 1997-06-05 Ericsson Inc. Detecting messages transmitted over a communications channel such as a paging channel
US5640395A (en) * 1994-05-03 1997-06-17 Nokia Mobile Phones Ltd. System for transmitting packet data in digital cellular time division multiple access (TDMA) air interface
US5642356A (en) * 1995-02-24 1997-06-24 Hughes Electronics Optimal paging of one or two cellular mobile stations using a hard page slot
DE19605223A1 (en) * 1996-02-13 1997-08-14 Sel Alcatel Ag A method of operating a broadband connection between a mobile terminal and a network-side mobile device and mobile radio terminal, the network side mobile radio device and the mobile radio system
US5687169A (en) * 1995-04-27 1997-11-11 Time Domain Systems, Inc. Full duplex ultrawide-band communication system and method
US5697059A (en) * 1994-05-19 1997-12-09 Airnet Communications Corp. System for dynamically allocating channels among base stations in a wireless communication system
US5701592A (en) * 1994-12-19 1997-12-23 Telefonaktiebolaget Lm Ericsson Method and system for desynchronizing overhead messages in a radiocommunication system
WO1998010605A1 (en) * 1996-09-06 1998-03-12 Nokia Mobile Phones Limited Mobile station and network having hierarchical index for cell broadcast service
US5729541A (en) * 1994-06-08 1998-03-17 Nokia Mobile Phones Ltd. System for transmitting packet data in radio telephone TDMA systems
US5734645A (en) * 1993-11-01 1998-03-31 Telefonaktiebolaget Lm Ericsson Layer 2 protocol in a cellular communication system
US5751704A (en) * 1996-03-01 1998-05-12 Lucent Technologies Inc. Technique for minimizing the variance of interference in packetized interference-limited wireless communication systems
WO1998023110A2 (en) * 1996-11-15 1998-05-28 Telefonaktiebolaget Lm Ericsson (Publ) Delivery of digital data messages in a dual mode cellular telephone network
US5764632A (en) * 1996-04-01 1998-06-09 Nokia Mobile Phones Limited Mobile terminal having improved paging channel acquisition in a system using a digital control channel
US5802465A (en) * 1993-09-06 1998-09-01 Nokia Mobile Phones Ltd. Data transmission in a radio telephone network
US5832367A (en) * 1995-12-12 1998-11-03 At&T Wireless Services, Inc. Method for selecting a wireless communications service provider in a multi-service provider environment
US5845203A (en) * 1996-01-25 1998-12-01 Aertis Cormmunications Remote access application messaging wireless method
US5857147A (en) * 1993-09-08 1999-01-05 Qualcom Incorporated Method and apparatus for determining the transmission data rate in a multi-user communication system
WO1999009775A2 (en) * 1997-08-19 1999-02-25 Nokia Networks Oy Information transmission in a telecommunications system
US5878033A (en) * 1994-03-22 1999-03-02 Nortel Marta Cellular Process and equipment for broadcasting messages to mobile radio communication stations
US5881365A (en) * 1996-01-18 1999-03-09 Clariti Telecommunications International, Ltd. Digital compressed voice paging system which uses R.D.S. format for the ID signals and S.C.A. format for the voice signals both formats being FM subcarriers
US5890071A (en) * 1994-10-27 1999-03-30 Toshiba Corporation Radio telephone set with broadcast receiving functions
US5898925A (en) * 1994-05-11 1999-04-27 Nokia Telecommunications Oy Method and arrangement for effecting transmission power control and/or handover of a mobile station assigned two or more time slots per frame in a TDMA telecommunications system
US5905955A (en) * 1995-12-12 1999-05-18 At&T Wireless Services Inc. Method for selecting a wireless service provider in a multi-service provider environment using a geographic database
US5910949A (en) * 1995-10-18 1999-06-08 Telefonaktiebolaget Lm Ericsson Packet channel feedback
US5937355A (en) * 1995-12-07 1999-08-10 Telefonaktiebolaget Lm Ericsson (Publ) Emergency call handling in a cellular telecommunication system
EP0939569A1 (en) * 1998-02-19 1999-09-01 ICO Services Ltd. Control information distribution in a TDMA mobile communication system
US5956631A (en) * 1993-12-30 1999-09-21 Lucent Technologies, Inc. Multiple terminal device ringing digital subscriber ISDN terminal
US5960031A (en) * 1994-09-20 1999-09-28 Time Domain Corporation Ultrawide-band communication system and method
US5963869A (en) * 1996-03-14 1999-10-05 Ericsson Inc. Method and apparatus for management of analog and digital control channels
US5978366A (en) * 1996-12-20 1999-11-02 Ericsson Inc. Methods and systems for reduced power operation of cellular mobile terminals
US5991600A (en) * 1997-07-09 1999-11-23 Ericsson Inc. Integration of mobile station channel measurement with paging channel displacement operation in a wireless communications system
US5999808A (en) * 1995-12-12 1999-12-07 Aeris Communications, Inc. Wireless gaming method
EP0977370A1 (en) * 1998-07-28 2000-02-02 Lucent Technologies Inc. Transmission power control for packet switched communication systems
EP0977373A2 (en) * 1995-07-12 2000-02-02 Ericsson Inc. Dual mode satellite/cellular terminal
US6026289A (en) * 1997-07-30 2000-02-15 Bellsouth Intellectual Property Corporation System and method for wireless broadcast on shared channels
US6029065A (en) * 1997-05-05 2000-02-22 Nokia Mobile Phones, Ltd. Remote feature code programming for mobile stations
US6041217A (en) * 1997-07-29 2000-03-21 Vlsi Technology, Inc. Personal handyphone system hardware checking of broadcasting reception indication
WO2000016575A1 (en) * 1998-09-10 2000-03-23 Siemens Aktiengesellschaft Method and radio communication system for providing a control channel
US6044086A (en) * 1994-09-16 2000-03-28 Ionica International Limited Control signal transmission in digital radio telephony
US6044265A (en) * 1995-06-05 2000-03-28 Bellsouth Corporation Methods and apparatus for cellular set programming
US6064692A (en) * 1997-06-20 2000-05-16 Amati Communications Corporation Protocol for transceiver initialization
WO2000030375A2 (en) * 1998-11-16 2000-05-25 Ericsson Inc. User group indication and status change in radiocommunication systems
WO2000030394A1 (en) * 1998-11-12 2000-05-25 Ericsson, Inc. Wireless communications methods and apparatus employing paging attribute descriptors
EP1009106A2 (en) * 1998-12-10 2000-06-14 Lucent Technologies Inc. Management of a wireless control channel
US6085087A (en) * 1995-08-29 2000-07-04 Kabushiki Kaisha Kenwood Roaming control method for digital mobile telephone
US6092222A (en) * 1994-12-19 2000-07-18 Nokia Telecommunications Oy Data transmission method, data transmission system, and cellular radio system
WO2000044122A1 (en) * 1999-01-22 2000-07-27 Ericsson, Inc. Methods and systems for coding of broadcast messages
US6111869A (en) * 1996-08-07 2000-08-29 Hitachi, Ltd. Method of mobile communication and apparatus therefor
WO2000052948A1 (en) * 1999-03-04 2000-09-08 Telefonaktiebolaget Lm Ericsson (Publ) Coordinating different types of messages sent to mobile radios in a mobile communications system
US6128349A (en) * 1997-05-12 2000-10-03 Texas Instruments Incorporated Method and apparatus for superframe bit allocation
US6134220A (en) * 1994-04-13 2000-10-17 Alcatel Cit Method of adapting the air interface in a mobile radio system and corresponding base transceiver station, mobile station and transmission mode
US6137772A (en) * 1997-11-14 2000-10-24 Telefonaktiebolaget Lm Ericsson (Publ) Method of updating a list of digital control channels (DCCH) in a mobile station in a radio telecommunications network
US6144859A (en) * 1993-08-27 2000-11-07 Aeris Communications, Inc. Wireless cellular communicator system and apparatus
WO2000072609A1 (en) * 1999-05-20 2000-11-30 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for broadcasting system information in a cellular communications network
WO2000074274A1 (en) * 1999-05-28 2000-12-07 Motorola Inc. Method and apparatus for providing simultaneous voice and data communication in a communication system
US6163694A (en) * 1997-08-22 2000-12-19 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for standby state cell selection in a cellular telephone system
US6175557B1 (en) 1994-10-31 2001-01-16 Telefonaktiebolaget Lm Ericsson (Publ) Layer 2 protocol in a cellular communication system
US6195532B1 (en) 1996-06-28 2001-02-27 At&T Wireless Srcs. Inc. Method for categorization of multiple providers in a wireless communications service environment
US6208624B1 (en) * 1996-11-14 2001-03-27 Ntt Mobile Communications Network Inc. Paging scheme for mobile communication system using increased paging channel data transmission rate
US6212373B1 (en) * 1996-09-11 2001-04-03 Fujitsu Limited Mobile telecommunication station
US6223042B1 (en) 1997-06-26 2001-04-24 At&T Wireless Services Inc Method of intelligent roaming using network information
US6240304B1 (en) * 1998-02-11 2001-05-29 Nokia Mobile Phones Ltd. Mobile terminal having RF power consumption optimization of extended standby mode
US6275701B1 (en) * 1997-02-25 2001-08-14 Telefonaktiebolaget Lm Ericsson (Publ) Method and device in a mobile telecommunications system
US6285868B1 (en) 1993-08-27 2001-09-04 Aeris Communications, Inc. Wireless communications application specific enabling method and apparatus
US6289227B1 (en) * 1999-05-20 2001-09-11 Qualcomm Incorporated Method and apparatus for scheduling wake-up time in a CDMA mobile station
EP1135862A1 (en) * 1998-12-04 2001-09-26 Motorola, Inc. Method for determining whether to wake up a mobile station
US6298235B1 (en) 1995-12-12 2001-10-02 At&T Wireless Services, Inc. Powered down selection of a preferable wireless communications service provider in a multi-service provider environment
US6314292B1 (en) * 1997-08-15 2001-11-06 Nortel Networks Limited Method and apparatus for enhanced call setup
US6377564B1 (en) * 1997-10-21 2002-04-23 Ericsson Inc. Method for increasing uplink bandwidth over a dedicated control channel
US20020071480A1 (en) * 1999-03-08 2002-06-13 Pekka Marjelund Method for establishing a communication between a user equipment and a radio network
US6408033B1 (en) 1997-05-12 2002-06-18 Texas Instruments Incorporated Method and apparatus for superframe bit allocation
US6411629B1 (en) * 1998-12-29 2002-06-25 Northern Telecom Limited Data interleaving method
US20020102994A1 (en) * 2001-01-30 2002-08-01 Nokia Corporation Method and apparatus for performing identification of measurement channels in TDMA E-OTD
US6456843B1 (en) 1996-10-08 2002-09-24 At&T Wireless Services, Inc. Method and apparatus for over-the-air programming of telecommunication services
US6470182B1 (en) 1998-08-17 2002-10-22 At&T Wireless Service, Inc. Mobile station roaming in a multiple service provider area
US20020160785A1 (en) * 2001-04-10 2002-10-31 Fredrik Ovesjo Commanding handover between differing radio access technologies
US20030002472A1 (en) * 2001-06-29 2003-01-02 Samsung Electronics Co., Ltd. Method for transmitting HSDPA service information in a CDMA mobile communication system
US20030022689A1 (en) * 2001-06-15 2003-01-30 Mcelwain John Method and apparatus for relating communications system identifications (SIDS)
US20030027581A1 (en) * 2001-07-31 2003-02-06 Nokia Corporation System and method for automatic provisioning detection and notification
US6522877B1 (en) 1996-09-06 2003-02-18 Nokia Mobile Phones Ltd. Methods and apparatus for providing an interactive cell broadcast service
US6535497B1 (en) * 1998-05-11 2003-03-18 Telefonaktiebolaget Lm Ericsson (Publ) Methods and systems for multiplexing of multiple users for enhanced capacity radiocommunications
US6549567B1 (en) 1994-09-20 2003-04-15 Time Domain Corporation Full duplex ultrawide-band communication system and method
US20030092386A1 (en) * 2001-10-26 2003-05-15 Gyorgy Miklos Predictable communication establishment in ad-hoc wireless network
US6577618B2 (en) 1995-10-18 2003-06-10 Telefonaktiebolaget L.M. Ericsson (Publ) Packet control channel feedback support for contention and reservation based access
US6600731B2 (en) * 1997-02-24 2003-07-29 Siemens Aktiengesellschaft Method and base station system for calling mobile stations for the transmission of packet data
US6600917B1 (en) 1999-10-04 2003-07-29 Telefonaktiebolaget Lm Ericsson (Publ) Telecommunications network broadcasting of service capabilities
US20030169723A1 (en) * 2002-03-05 2003-09-11 John Diachina Wireless communications apparatus, methods and computer program products using broadcast channel messaging for application transport
US6622251B1 (en) * 1999-04-07 2003-09-16 Telefonaktiebolaget Lm Ericsson (Publ) Method to put a mobile terminal into sleep when a frame control channel containing a location of slow broadcast channel does not include wakeup information
US20030179738A1 (en) * 2002-03-05 2003-09-25 John Diachina Wireless communications apparatus, methods and computer program products using broadcast control channel messaging
US6633754B1 (en) * 1997-04-22 2003-10-14 Ericsson Inc. Systems and methods for increasing emergency call access speed in radiocommunication systems
WO2003092320A1 (en) * 2002-04-24 2003-11-06 Ericsson Inc. Wireless communications apparatus, methods and computer program products using broadcast control channel messaging
US6646995B1 (en) 1996-10-11 2003-11-11 Alcatel Cit Method of adapting the air interface and mobile radio system and corresponding base transceiver station, mobile station and transmission mode
US6680920B1 (en) 1997-10-29 2004-01-20 Skyworks Solutions, Inc. Power management system for a mobile station
US20040042556A1 (en) * 2002-08-27 2004-03-04 Irina Medvedev Coded MIMO systems with selective channel inversion applied per eigenmode
US20040072574A1 (en) * 2002-09-27 2004-04-15 Matz William R. Apparatus and method for providing dynamic communications network traffic control
US6725068B2 (en) * 1997-08-05 2004-04-20 Tokyo Digital Phone Co., Ltd. Digital wireless telephone system
US20040085939A1 (en) * 2002-10-25 2004-05-06 Wallace Mark S. Channel calibration for a time division duplexed communication system
US20040125800A1 (en) * 1997-07-30 2004-07-01 Sam Zellner Associated systems and methods for providing data services using idle cell resources
US20040136349A1 (en) * 2002-10-25 2004-07-15 Walton J. Rodney MIMO system with multiple spatial multiplexing modes
US6775548B1 (en) 1998-06-22 2004-08-10 Nokia Mobile Phones Ltd. Access channel for reduced access delay in a telecommunications system
US20040156328A1 (en) * 2002-10-25 2004-08-12 Walton J. Rodney Random access for wireless multiple-access communication systems
US6782259B2 (en) 1995-12-12 2004-08-24 At&T Wireless Services, Inc. Method for selecting a preferable wireless communication service provider in a multi-service provider environment
US20040174435A1 (en) * 1999-06-28 2004-09-09 Olympus Optical Co., Ltd. Information processing system and camera system
US20040179627A1 (en) * 2002-10-25 2004-09-16 Ketchum John W. Pilots for MIMO communication systems
US6795425B1 (en) 1998-11-12 2004-09-21 Ericsson Inc. Wireless communications methods and apparatus employing paging attribute descriptors
US20040203626A1 (en) * 1996-08-07 2004-10-14 Hitachi, Ltd. Method of mobile communication and apparatus therefor
US20050037719A1 (en) * 2002-01-31 2005-02-17 Mitsubishi Denki Kabushiki Kaisha Information notification method, mobile communications system, base station, and mobile station
US20050064880A1 (en) * 1997-05-30 2005-03-24 Butler Brian K. Dual event slotted paging
US20050105487A1 (en) * 2003-11-18 2005-05-19 Interdigital Technology Corporation Method and system for providing channel assignment information used to support uplink and downlink channels
US20050124345A1 (en) * 2003-12-05 2005-06-09 Raiv Laroia Methods and apparatus for performing handoffs in a multi-carrier wireless communications system
US20050135308A1 (en) * 2003-10-24 2005-06-23 Qualcomm Incorporated Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system
US20050141475A1 (en) * 2003-09-02 2005-06-30 Qualcomm Incorporated Transmission of overhead information for reception of multiple data streams
EP1553797A1 (en) * 2004-01-09 2005-07-13 M-Stack Limited Apparatus and method for implementing detection of system information changes in universal mobile telecommunications systems
US20050169205A1 (en) * 2003-08-21 2005-08-04 Francesco Grilli Methods for seamless delivery of broadcast and multicast content across cell borders and/or between different transmission schemes and related apparatus
US20050193309A1 (en) * 2003-08-21 2005-09-01 Francesco Grilli Methods for forward error correction coding above a radio link control layer and related apparatus
US6968189B1 (en) * 1999-03-04 2005-11-22 Ico Services Ltd. Neighboring cell list generation in a mobile satellite communication system
US6973055B1 (en) * 1999-04-28 2005-12-06 Koninklijke Philips Electronics N.V. Network with several network clusters for wireless transmission of packets
US20060023665A1 (en) * 1997-07-30 2006-02-02 Bellsouth Intellectual Property Corporation Method for dynamic multi-level pricing for wireless communications according to quality of service
US7016320B1 (en) 1999-08-31 2006-03-21 Telefonaktiebolaget Lm Ericsson (Publ) Subscriber station, network control means and method for carrying out inter-frequency measurements in a mobile communication system
US20060073836A1 (en) * 2003-12-05 2006-04-06 Rajiv Laroia Base station based methods and apparatus for supporting break before make handoffs in a multi-carrier system
EP1531562A3 (en) * 2003-11-15 2006-05-10 Samsung Electronics Co., Ltd. Appartaus and method for data rate transmission of user equipment in mobile communication system
US7046643B1 (en) 1997-07-30 2006-05-16 Bellsouth Intellectual Property Corporation Method for dynamic multi-level pricing for wireless communications according to quality of service
US7050445B1 (en) 1997-07-30 2006-05-23 Bellsouth Intellectual Property Corporation System and method for dynamic allocation of capacity on wireless networks
WO2006102807A1 (en) * 2005-03-28 2006-10-05 Huawei Technologies Co., Ltd. Method for receiving multimedia broadcast/multicast service control information
US20060227732A1 (en) * 2005-04-01 2006-10-12 Interdigital Technology Corporation Method and apparatus for providing multi-rate broadcast services
US20060245386A1 (en) * 2004-09-30 2006-11-02 Hao Hu Method for notifying changes of cell information in multimedia broadcast/multicast service
US20060286961A1 (en) * 2005-06-15 2006-12-21 Levitan Benjamin C System and method for determining a location of an emergency call in a sparsely-populated area
US20060285605A1 (en) * 2005-06-16 2006-12-21 Qualcomm Incorporated Coding and modulation for multiple data streams in a communication system
US7187935B1 (en) 2001-10-16 2007-03-06 International Business Machines Corporation Method and software for low bandwidth presence via aggregation and profiling
US7224683B1 (en) * 1999-08-06 2007-05-29 Eads Secure Networks Radio communication method between a base station and mobile terminals, base stations and mobile terminals for implementing same
KR100733683B1 (en) 1999-05-20 2007-06-28 텔레폰악티에볼라겟엘엠에릭슨(펍) Method and apparatus for broadcasting system information in a cellular communications network
EP1804541A1 (en) * 2005-12-27 2007-07-04 Telefonaktiebolaget L M Ericsson (Publ) Method and device for communicating incremental broadcast information
WO2007073832A1 (en) * 2005-12-27 2007-07-05 Telefonaktiebolaget Lm Ericsson (Publ) Method and device for communicating incremental broadcast information
US20070178875A1 (en) * 2005-06-28 2007-08-02 Rao Anil S Systems, methods, and apparatus for activity control in a wireless communications device
US7305012B1 (en) * 2000-07-24 2007-12-04 Siemens Information And Communication Networks S.P.A. Method and system to synchronize mobile units to a base transceiver station
US20080014953A1 (en) * 1994-06-24 2008-01-17 Gpne Corp. Communication system with a request by a single node made over one of two separate slots in a frame
US7321611B2 (en) 1994-09-20 2008-01-22 Alereen, Inc. Method and transceiver for full duplex communication of ultra wideband signals
US20080045185A1 (en) * 2006-08-18 2008-02-21 Samsung Electronics Co., Ltd. Method and apparatus for reporting reception ratio of streaming service by terminal in a mobile broadcasting system, and system thereof
US20080049857A1 (en) * 2002-10-25 2008-02-28 Qualcomm Incorporated Data detection and demodulation for wireless communication systems
US20080107192A1 (en) * 2003-09-02 2008-05-08 Qualcomm Incorporated Systems and Methods for Generalized Slot-to-Interlace Mapping
US20080186935A1 (en) * 2003-09-02 2008-08-07 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US20080200180A1 (en) * 2007-02-16 2008-08-21 Sean Dunn Using location information to set radio transmitter characteristics for regulatory compliance
US20080259842A1 (en) * 2007-04-20 2008-10-23 Research In Motion Multicast Control Channel Design
US20080285669A1 (en) * 2002-10-25 2008-11-20 Qualcomm Incorporated Mimo wlan system
US20080285668A1 (en) * 2005-10-31 2008-11-20 Lee Young-Dae Method for Processing Control Information in a Wireless Mobile Communication System
KR100870594B1 (en) 1999-01-22 2008-11-25 에릭슨 인크. Methods and systems for coding of broadcast messages
US20080291860A1 (en) * 2003-09-02 2008-11-27 Rajiv Vijayan Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US20080298319A1 (en) * 2005-10-31 2008-12-04 Lee Young-Dae Data Receiving Method For Mobile Communication Terminal
US7483699B2 (en) * 1998-09-22 2009-01-27 Qualcomm Incorporated Overhead message update with decentralized control
US20090061914A1 (en) * 2007-09-05 2009-03-05 Research In Motion Limited Multicast/Broadcast Single Frequency Network Control Information Transmission
US20090073908A1 (en) * 2007-09-13 2009-03-19 Research In Motion Limited Indication of Multicast Control Information
US7539237B2 (en) 1996-12-06 2009-05-26 Alereon, Inc. Fast locking mechanism for channelized ultrawide-band communications
US20090175282A1 (en) * 2008-01-04 2009-07-09 Babin Stephen W Using a Transmission Control Protocol (TCP) Channel to Save Power for Virtual Private Networks (VPNs) That Use User Datagram Protocol (UDP)
US20090175210A1 (en) * 2007-07-26 2009-07-09 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US20090213853A1 (en) * 2008-02-21 2009-08-27 Samsung Electronics Co., Ltd. Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system
US20090219884A1 (en) * 2008-03-03 2009-09-03 Samsung Electronics Co., Ltd. Method and apparatus for transmitting/receiving control information in a wireless communication system
US7590083B2 (en) 1995-12-07 2009-09-15 Transcore Link Logistics Corp. Wireless packet data distributed communications system
EP2101537A1 (en) * 1997-05-30 2009-09-16 Qualcomm Incorporated Apparatus for maximisation of standby time of CDMA wireless terminals by two stage paging via a PICH or quick paging channel QPCH
US20090307560A1 (en) * 2008-06-05 2009-12-10 Panasonic Corporation Coding apparatus, coding processing target sequence forming method and viterbi decoding apparatus
US20100034158A1 (en) * 2008-08-11 2010-02-11 Qualcomm Incorporated Processing measurement gaps in a wireless communication system
US20100093378A1 (en) * 2008-10-13 2010-04-15 Qualcomm Incorporated Methods and systems for power saving paging in a mobile wimax system
US20100113083A1 (en) * 2006-08-18 2010-05-06 Jijun Luo Transmission of organizational information depending on the direction in a systemwide channel
US20100122098A1 (en) * 2008-11-12 2010-05-13 Cisco Technology, Inc. Generic network wake-up capabilities for terminal devices
US20100172279A1 (en) * 2002-05-06 2010-07-08 Qualcomm Incorporated Multi-media broadcast and multicast service (mbms) in a wireless communication system
US20100318886A1 (en) * 2001-05-14 2010-12-16 Interdigital Technology Corporation Method and apparatus for processing a downlink shared channel
US20110081898A1 (en) * 2009-10-02 2011-04-07 Sharp Laboratories Of America, Inc. Determining whether system information can be reused and managing system information in a wireless communication system
US20110216684A1 (en) * 2008-10-30 2011-09-08 Samsung Electronics Co., Ltd. Multi-carriers managing device and method and sleep mode operating method of terminal
US20110267995A1 (en) * 2010-04-30 2011-11-03 Samsung Electronics Co., Ltd. Apparatus and method for transmitting ACK/NACK in TDD system
US20120092125A1 (en) * 2010-10-15 2012-04-19 Jordan Ari Farber Method and Apparatus Pertaining to Message-Based Functionality
US8203978B2 (en) 2002-10-25 2012-06-19 Qualcomm Incorporated Multi-mode terminal in a wireless MIMO system
US8218609B2 (en) 2002-10-25 2012-07-10 Qualcomm Incorporated Closed-loop rate control for a multi-channel communication system
US8291300B2 (en) 2003-08-21 2012-10-16 Qualcomm Incorporated Outer coding methods for broadcast/multicast content and related apparatus
US8412220B2 (en) 2003-07-09 2013-04-02 Interdigital Technology Corporation Method and system wherein timeslots allocated for common control channels may be reused for user traffic
US8559942B2 (en) 1997-08-04 2013-10-15 Mundi Fomukong Updating a mobile device's location
US8570988B2 (en) 2002-10-25 2013-10-29 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US20140226637A1 (en) * 2011-06-13 2014-08-14 Neul Ltd. Very long frame in a machine to machine communication network
US8831616B2 (en) 2005-10-31 2014-09-09 Lg Electronics Inc. Data transfer management in a radio communications network
US8855226B2 (en) 2005-05-12 2014-10-07 Qualcomm Incorporated Rate selection with margin sharing
US8873365B2 (en) 2002-10-25 2014-10-28 Qualcomm Incorporated Transmit diversity processing for a multi-antenna communication system
US8892722B1 (en) * 2009-06-22 2014-11-18 Marvell International Ltd. Peer-to-peer discovery systems and methods
US9036496B2 (en) 2012-01-09 2015-05-19 Qualcomm Incorporated Devices and methods for facilitating overhead message updates in wireless communications systems
US9154274B2 (en) 2002-10-25 2015-10-06 Qualcomm Incorporated OFDM communication system with multiple OFDM symbol sizes
US20160119871A1 (en) * 2012-09-21 2016-04-28 Beijing Xinwei Telecom Technology Inc. Method and system for waking sleeping trunking terminal up
US9473269B2 (en) 2003-12-01 2016-10-18 Qualcomm Incorporated Method and apparatus for providing an efficient control channel structure in a wireless communication system
US9551785B1 (en) 1999-04-07 2017-01-24 James L. Geer Method and apparatus for the detection of objects using electromagnetic wave attenuation patterns

Families Citing this family (104)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5590092A (en) * 1995-01-05 1996-12-31 Ericsson Inc. Systems and methods for generating a current time of day in a cellular radiotelephone
WO1998048521A3 (en) * 1997-04-24 1999-01-21 Jan Meyer Terminal unit for digital mobile radiotelephone communication and method for evaluating data received in a terminal unit of this type
FI109861B (en) 1998-01-05 2002-10-15 Nokia Corp A method for efficient utilization of the capacity of the cell broadcast
JP3270926B2 (en) * 1998-02-02 2002-04-02 富士通株式会社 Mobile communication system and a mobile communication device
RU2142190C1 (en) * 1999-03-11 1999-11-27 Общество с ограниченной ответственностью "Дэмп Бэк" Time-dependent ac power generation process
RU2143168C1 (en) * 1999-03-11 1999-12-20 Общество с ограниченной ответственностью "Дэмп Бэк" Method for alternating electric power production
WO2002001769A3 (en) * 2000-06-28 2002-06-20 Ericsson Telefon Ab L M Plural signaling channels for communicating signaling information to a user equipment terminal in a radio communications system
GB2366138B (en) * 2000-08-14 2002-10-30 Qualcomm Inc A method of, and apparatus for, communicating messages to a mobile station
US7295509B2 (en) 2000-09-13 2007-11-13 Qualcomm, Incorporated Signaling method in an OFDM multiple access system
US9130810B2 (en) 2000-09-13 2015-09-08 Qualcomm Incorporated OFDM communications methods and apparatus
US20030016702A1 (en) * 2001-03-30 2003-01-23 Bender Paul E. Method and system for maximizing standby time in monitoring a control channel
US6873606B2 (en) * 2002-10-16 2005-03-29 Qualcomm, Incorporated Rate adaptive transmission scheme for MIMO systems
CN101425874B (en) 2002-10-25 2012-12-05 高通股份有限公司 Data detection and demodulation for wireless communication systems
US7042857B2 (en) 2002-10-29 2006-05-09 Qualcom, Incorporated Uplink pilot and signaling transmission in wireless communication systems
US7660282B2 (en) 2003-02-18 2010-02-09 Qualcomm Incorporated Congestion control in a wireless data network
US20040160922A1 (en) 2003-02-18 2004-08-19 Sanjiv Nanda Method and apparatus for controlling data rate of a reverse link in a communication system
US8150407B2 (en) 2003-02-18 2012-04-03 Qualcomm Incorporated System and method for scheduling transmissions in a wireless communication system
US8081598B2 (en) 2003-02-18 2011-12-20 Qualcomm Incorporated Outer-loop power control for wireless communication systems
US8391249B2 (en) 2003-02-18 2013-03-05 Qualcomm Incorporated Code division multiplexing commands on a code division multiplexed channel
US8023950B2 (en) 2003-02-18 2011-09-20 Qualcomm Incorporated Systems and methods for using selectable frame durations in a wireless communication system
US7155236B2 (en) 2003-02-18 2006-12-26 Qualcomm Incorporated Scheduled and autonomous transmission and acknowledgement
US8694042B2 (en) 2005-10-14 2014-04-08 Qualcomm Incorporated Method and apparatus for determining a base station's transmission power budget
US9661519B2 (en) 2003-02-24 2017-05-23 Qualcomm Incorporated Efficient reporting of information in a wireless communication system
US9544860B2 (en) 2003-02-24 2017-01-10 Qualcomm Incorporated Pilot signals for use in multi-sector cells
US9191840B2 (en) 2005-10-14 2015-11-17 Qualcomm Incorporated Methods and apparatus for determining, communicating and using information which can be used for interference control
US8514692B2 (en) 2003-02-24 2013-08-20 Qualcomm Incorporated Methods and apparatus for determining, communicating and using information which can be used for interference control purposes
US7218948B2 (en) 2003-02-24 2007-05-15 Qualcomm Incorporated Method of transmitting pilot tones in a multi-sector cell, including null pilot tones, for generating channel quality indicators
US8811348B2 (en) 2003-02-24 2014-08-19 Qualcomm Incorporated Methods and apparatus for generating, communicating, and/or using information relating to self-noise
US8503938B2 (en) 2004-10-14 2013-08-06 Qualcomm Incorporated Methods and apparatus for determining, communicating and using information including loading factors which can be used for interference control purposes
US7215930B2 (en) 2003-03-06 2007-05-08 Qualcomm, Incorporated Method and apparatus for providing uplink signal-to-noise ratio (SNR) estimation in a wireless communication
US8705588B2 (en) 2003-03-06 2014-04-22 Qualcomm Incorporated Systems and methods for using code space in spread-spectrum communications
KR100595585B1 (en) 2003-05-13 2006-07-03 엘지전자 주식회사 Radio resource management method for mbms in mobile communication system
US8477592B2 (en) 2003-05-14 2013-07-02 Qualcomm Incorporated Interference and noise estimation in an OFDM system
US8559406B2 (en) 2003-06-03 2013-10-15 Qualcomm Incorporated Method and apparatus for communications of data in a communication system
US8489949B2 (en) 2003-08-05 2013-07-16 Qualcomm Incorporated Combining grant, acknowledgement, and rate control commands
US7546132B2 (en) 2004-04-19 2009-06-09 Lg Electronics, Inc. Communication of point to multipoint service information in wireless communication system
US7636331B2 (en) 2004-04-19 2009-12-22 Lg Electronic Inc. Transmission of control information in wireless communication system
US9137822B2 (en) 2004-07-21 2015-09-15 Qualcomm Incorporated Efficient signaling over access channel
US9148256B2 (en) 2004-07-21 2015-09-29 Qualcomm Incorporated Performance based rank prediction for MIMO design
US8891349B2 (en) 2004-07-23 2014-11-18 Qualcomm Incorporated Method of optimizing portions of a frame
WO2006031091A1 (en) 2004-09-18 2006-03-23 Samsung Electronics Co., Ltd. Apparatus and method for transmitting/receiving packet in a mobile communication system
US7643515B2 (en) 2004-11-10 2010-01-05 Qualcomm Incorporated Method and apparatus for deriving transmission timing of a downlink control channel in support of enhanced uplink operation
US8238923B2 (en) 2004-12-22 2012-08-07 Qualcomm Incorporated Method of using shared resources in a communication system
US8831115B2 (en) 2004-12-22 2014-09-09 Qualcomm Incorporated MC-CDMA multiplexing in an orthogonal uplink
US8160046B2 (en) * 2004-12-22 2012-04-17 Qualcomm Incorporated Control channel assignment in a wireless communication network
US9246560B2 (en) 2005-03-10 2016-01-26 Qualcomm Incorporated Systems and methods for beamforming and rate control in a multi-input multi-output communication systems
US9154211B2 (en) 2005-03-11 2015-10-06 Qualcomm Incorporated Systems and methods for beamforming feedback in multi antenna communication systems
US9143305B2 (en) 2005-03-17 2015-09-22 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9461859B2 (en) 2005-03-17 2016-10-04 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9520972B2 (en) 2005-03-17 2016-12-13 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
WO2006104343A3 (en) 2005-03-29 2007-08-09 Lg Electronics Inc A method of transmitting and receiving control information for point-to-multipoint multimedia multicast service
US9184870B2 (en) 2005-04-01 2015-11-10 Qualcomm Incorporated Systems and methods for control channel signaling
RU2357370C1 (en) 2005-04-02 2009-05-27 Самсунг Электроникс Ко., Лтд. Device and method of transmitting stream in mobile broadcasting system
US9408220B2 (en) 2005-04-19 2016-08-02 Qualcomm Incorporated Channel quality reporting for adaptive sectorization
US9036538B2 (en) 2005-04-19 2015-05-19 Qualcomm Incorporated Frequency hopping design for single carrier FDMA systems
US9179319B2 (en) 2005-06-16 2015-11-03 Qualcomm Incorporated Adaptive sectorization in cellular systems
WO2006135221A1 (en) 2005-06-17 2006-12-21 Samsung Electronics Co., Ltd. Apparatus and method for transmitting/receiving broadcast data in a mobile communication system
US8885628B2 (en) 2005-08-08 2014-11-11 Qualcomm Incorporated Code division multiplexing in a single-carrier frequency division multiple access system
US20070041457A1 (en) 2005-08-22 2007-02-22 Tamer Kadous Method and apparatus for providing antenna diversity in a wireless communication system
US9209956B2 (en) 2005-08-22 2015-12-08 Qualcomm Incorporated Segment sensitive scheduling
US8644292B2 (en) 2005-08-24 2014-02-04 Qualcomm Incorporated Varied transmission time intervals for wireless communication system
US9136974B2 (en) 2005-08-30 2015-09-15 Qualcomm Incorporated Precoding and SDMA support
US8045512B2 (en) 2005-10-27 2011-10-25 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US9225488B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Shared signaling channel
US9225416B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Varied signaling channels for a reverse link in a wireless communication system
US9172453B2 (en) 2005-10-27 2015-10-27 Qualcomm Incorporated Method and apparatus for pre-coding frequency division duplexing system
US9144060B2 (en) 2005-10-27 2015-09-22 Qualcomm Incorporated Resource allocation for shared signaling channels
US8693405B2 (en) 2005-10-27 2014-04-08 Qualcomm Incorporated SDMA resource management
US8582509B2 (en) 2005-10-27 2013-11-12 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US8879511B2 (en) 2005-10-27 2014-11-04 Qualcomm Incorporated Assignment acknowledgement for a wireless communication system
US9088384B2 (en) 2005-10-27 2015-07-21 Qualcomm Incorporated Pilot symbol transmission in wireless communication systems
US9210651B2 (en) 2005-10-27 2015-12-08 Qualcomm Incorporated Method and apparatus for bootstraping information in a communication system
RU2411660C2 (en) 2005-10-31 2011-02-10 Эл Джи Электроникс Инк. Method to transfer and receive information on radio access in system of wireless mobile communication
US8305970B2 (en) 2005-10-31 2012-11-06 Lg Electronics Inc. Method of transmitting a measurement report in a wireless mobile communications system
WO2007069822A3 (en) * 2005-11-02 2008-08-07 Suk Woo Lee Method and apparatus for overhead reduction of signaling messages
US9125092B2 (en) 2005-12-22 2015-09-01 Qualcomm Incorporated Methods and apparatus for reporting and/or using control information
US8437251B2 (en) 2005-12-22 2013-05-07 Qualcomm Incorporated Methods and apparatus for communicating transmission backlog information
US9572179B2 (en) 2005-12-22 2017-02-14 Qualcomm Incorporated Methods and apparatus for communicating transmission backlog information
US9137072B2 (en) 2005-12-22 2015-09-15 Qualcomm Incorporated Methods and apparatus for communicating control information
US9119220B2 (en) 2005-12-22 2015-08-25 Qualcomm Incorporated Methods and apparatus for communicating backlog related information
US8514771B2 (en) 2005-12-22 2013-08-20 Qualcomm Incorporated Methods and apparatus for communicating and/or using transmission power information
US9473265B2 (en) 2005-12-22 2016-10-18 Qualcomm Incorporated Methods and apparatus for communicating information utilizing a plurality of dictionaries
US9125093B2 (en) 2005-12-22 2015-09-01 Qualcomm Incorporated Methods and apparatus related to custom control channel reporting formats
US9451491B2 (en) 2005-12-22 2016-09-20 Qualcomm Incorporated Methods and apparatus relating to generating and transmitting initial and additional control information report sets in a wireless system
US9338767B2 (en) 2005-12-22 2016-05-10 Qualcomm Incorporated Methods and apparatus of implementing and/or using a dedicated control channel
US9148795B2 (en) 2005-12-22 2015-09-29 Qualcomm Incorporated Methods and apparatus for flexible reporting of control information
US20070253449A1 (en) 2005-12-22 2007-11-01 Arnab Das Methods and apparatus related to determining, communicating, and/or using delay information
US20070243882A1 (en) 2006-04-12 2007-10-18 Qualcomm Incorporated Method and apparatus for locating a wireless local area network associated with a wireless wide area network
US8774204B2 (en) * 2006-09-25 2014-07-08 Fisher-Rosemount Systems, Inc. Handheld field maintenance bus monitor
US8000326B2 (en) * 2007-02-01 2011-08-16 Qualcomm Incorporated Method and apparatus for fragmenting a control message in wireless communication system
CA2681378C (en) 2007-03-21 2013-10-08 Interdigital Technology Corporation Mimo wireless communication method and apparatus for transmitting and decoding resource block structures based on a dedicated reference signal mode
EP1990952B1 (en) * 2007-05-07 2013-10-23 Alcatel Lucent Application module and remote management server with parameter description model
CN101682478B (en) * 2007-06-18 2013-07-17 艾利森电话股份有限公司 Transmission of system information
WO2009038129A1 (en) * 2007-09-18 2009-03-26 Ntt Docomo, Inc. Report information transmission method, radio base station, and mobile station
US8917598B2 (en) 2007-12-21 2014-12-23 Qualcomm Incorporated Downlink flow control
US8340014B2 (en) * 2007-12-26 2012-12-25 Lg Electronics Inc. Method for transmitting and receiving signals using multi-band radio frequencies
US8699487B2 (en) 2008-02-04 2014-04-15 Qualcomm Incorporated Uplink delay budget feedback
US8656239B2 (en) 2008-02-12 2014-02-18 Qualcomm Incorporated Control of data transmission based on HARQ in a wireless communication system
US8787989B2 (en) 2008-02-15 2014-07-22 Qualcomm Incorporated Efficient sleep mode operation for OFDMA systems
KR101162805B1 (en) * 2008-02-21 2012-07-05 삼성전자주식회사 Apparatus and method for transmitting/receiving control information in a wireless digital broadcasting system
US20100034126A1 (en) * 2008-08-08 2010-02-11 Qualcomm Incorporated Method and apparatus for handling measurement gaps in wireless networks
KR100968022B1 (en) * 2008-11-27 2010-07-07 엘지전자 주식회사 Method of determining an access mode of cell in a wireless communication system
GB2465664B (en) 2008-11-27 2011-02-09 Lg Electronics Inc Method of determining an access mode of cell in a wireless communication system
RU2630420C1 (en) * 2016-05-05 2017-09-07 Юрий Алексеевич Громаков System of cellular communication with channel capacity transfer

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4399555A (en) * 1980-04-28 1983-08-16 Bell Telephone Laboratories, Incorporated Cellular high capacity mobile radiotelephone system with fleet-calling arrangement for dispatch service
US4713808A (en) * 1985-11-27 1987-12-15 A T & E Corporation Watch pager system and communication protocol
US4777633A (en) * 1987-08-14 1988-10-11 International Mobile Machines Corp. Base station for wireless digital telephone system
US4811420A (en) * 1987-07-08 1989-03-07 International Mobile Machines Corporation Initialization of communication channel between a subsciber station and a base station in a subscriber communication system
US5051988A (en) * 1988-11-02 1991-09-24 Mitsubishi Denki Kabushiki Kaisha Transmission line encoding/decoding system
US5081704A (en) * 1989-09-19 1992-01-14 Nippon Telegraph & Telephone Corp. Method of arranging radio control channels in mobile communications
US5129097A (en) * 1989-11-28 1992-07-07 Nippon Telegraph And Telephone Corporation Paging channel selection system in mobile communication system
US5230084A (en) * 1990-12-06 1993-07-20 Motorola, Inc. Selective call receiver having extended battery saving capability
US5241542A (en) * 1991-08-23 1993-08-31 International Business Machines Corporation Battery efficient operation of scheduled access protocol

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4399555A (en) * 1980-04-28 1983-08-16 Bell Telephone Laboratories, Incorporated Cellular high capacity mobile radiotelephone system with fleet-calling arrangement for dispatch service
US4713808A (en) * 1985-11-27 1987-12-15 A T & E Corporation Watch pager system and communication protocol
US4811420A (en) * 1987-07-08 1989-03-07 International Mobile Machines Corporation Initialization of communication channel between a subsciber station and a base station in a subscriber communication system
US4777633A (en) * 1987-08-14 1988-10-11 International Mobile Machines Corp. Base station for wireless digital telephone system
US5051988A (en) * 1988-11-02 1991-09-24 Mitsubishi Denki Kabushiki Kaisha Transmission line encoding/decoding system
US5081704A (en) * 1989-09-19 1992-01-14 Nippon Telegraph & Telephone Corp. Method of arranging radio control channels in mobile communications
US5129097A (en) * 1989-11-28 1992-07-07 Nippon Telegraph And Telephone Corporation Paging channel selection system in mobile communication system
US5230084A (en) * 1990-12-06 1993-07-20 Motorola, Inc. Selective call receiver having extended battery saving capability
US5241542A (en) * 1991-08-23 1993-08-31 International Business Machines Corporation Battery efficient operation of scheduled access protocol

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Portions of Digital Cellular Standard, RCR STD 27A, Jan. 30, 1992. *
Portions of Digital Cellular Standard, RCR STD 27B, Dec. 10, 1992. *
Portions of Digital Cellular Standard, RCR STD-27A, Jan. 30, 1992.
Portions of Digital Cellular Standard, RCR STD-27B, Dec. 10, 1992.

Cited By (411)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5535423A (en) * 1993-05-28 1996-07-09 Societe Anonyme Dite Alcatel Radiotelephone Method of exchanging data between a base transceiver station of a mobile radio network and a mobile in the network
US6285868B1 (en) 1993-08-27 2001-09-04 Aeris Communications, Inc. Wireless communications application specific enabling method and apparatus
US6144859A (en) * 1993-08-27 2000-11-07 Aeris Communications, Inc. Wireless cellular communicator system and apparatus
US5802465A (en) * 1993-09-06 1998-09-01 Nokia Mobile Phones Ltd. Data transmission in a radio telephone network
US8041302B2 (en) 1993-09-08 2011-10-18 Qualcomm Incorporated Method and apparatus for determining the transmission data rate in a multi-user communication system
US5857147A (en) * 1993-09-08 1999-01-05 Qualcom Incorporated Method and apparatus for determining the transmission data rate in a multi-user communication system
US20070033018A1 (en) * 1993-09-08 2007-02-08 Gardner William R Method and apparatus for determining the transmission data rate in a multi-user communication system
US7146174B2 (en) * 1993-09-08 2006-12-05 Qualcomm Incorporated Method and apparatus for determining the transmission data rate in a multi-user communication system
US5923649A (en) * 1993-11-01 1999-07-13 Telefonaktiebolaget Lm Ericsson Layer 2 protocol in a cellular communication system
US5734645A (en) * 1993-11-01 1998-03-31 Telefonaktiebolaget Lm Ericsson Layer 2 protocol in a cellular communication system
US5956631A (en) * 1993-12-30 1999-09-21 Lucent Technologies, Inc. Multiple terminal device ringing digital subscriber ISDN terminal
US5878033A (en) * 1994-03-22 1999-03-02 Nortel Marta Cellular Process and equipment for broadcasting messages to mobile radio communication stations
US6134220A (en) * 1994-04-13 2000-10-17 Alcatel Cit Method of adapting the air interface in a mobile radio system and corresponding base transceiver station, mobile station and transmission mode
US6456598B1 (en) 1994-04-13 2002-09-24 Alcatel Cit Method of adapting the air interface in a mobile radio system and corresponding base transceiver station, mobile station and transmission mode
USRE39375E1 (en) * 1994-05-03 2006-11-07 Nokia Mobile Phones Ltd System for transmitting packet data in digital cellular time division multiple access (TDMA) air interface
US5640395A (en) * 1994-05-03 1997-06-17 Nokia Mobile Phones Ltd. System for transmitting packet data in digital cellular time division multiple access (TDMA) air interface
US5898925A (en) * 1994-05-11 1999-04-27 Nokia Telecommunications Oy Method and arrangement for effecting transmission power control and/or handover of a mobile station assigned two or more time slots per frame in a TDMA telecommunications system
US5697059A (en) * 1994-05-19 1997-12-09 Airnet Communications Corp. System for dynamically allocating channels among base stations in a wireless communication system
US5729541A (en) * 1994-06-08 1998-03-17 Nokia Mobile Phones Ltd. System for transmitting packet data in radio telephone TDMA systems
US20080014953A1 (en) * 1994-06-24 2008-01-17 Gpne Corp. Communication system with a request by a single node made over one of two separate slots in a frame
US20110026499A1 (en) * 1994-06-24 2011-02-03 Gpne Corp. Communication system with a mapping system allowing nodes to register with a controller
US8335195B2 (en) 1994-06-24 2012-12-18 GPNE Corporation Communication system allowing node identification
US8311020B2 (en) 1994-06-24 2012-11-13 GPNE Corporation Communication system allowing network nodes to efficiently establish communications with a controller
US8233460B2 (en) 1994-06-24 2012-07-31 Gpne Corp. Communication system with map of information provided from controller to enable communication with nodes
US20110170677A1 (en) * 1994-06-24 2011-07-14 Gpne Corp. Communication system allowing network nodes to efficiently establish communications with a controller
US6044086A (en) * 1994-09-16 2000-03-28 Ionica International Limited Control signal transmission in digital radio telephony
US5546464A (en) * 1994-09-16 1996-08-13 Ericsson Inc. Method of and apparatus for selective resynchronization in a digital cellular communications system
US5963581A (en) * 1994-09-20 1999-10-05 Time Domain Corporation Ultrawide-band communication system and method
US6031862A (en) * 1994-09-20 2000-02-29 Time Domain Corporation Ultrawide-band communication system and method
US6430208B1 (en) 1994-09-20 2002-08-06 Time Domain Corporation Ultrawide-band communication system and method
US6549567B1 (en) 1994-09-20 2003-04-15 Time Domain Corporation Full duplex ultrawide-band communication system and method
US5995534A (en) * 1994-09-20 1999-11-30 Time Domain Corporation Ultrawide-band communication system and method
US5960031A (en) * 1994-09-20 1999-09-28 Time Domain Corporation Ultrawide-band communication system and method
US7321611B2 (en) 1994-09-20 2008-01-22 Alereen, Inc. Method and transceiver for full duplex communication of ultra wideband signals
US5890071A (en) * 1994-10-27 1999-03-30 Toshiba Corporation Radio telephone set with broadcast receiving functions
US6175557B1 (en) 1994-10-31 2001-01-16 Telefonaktiebolaget Lm Ericsson (Publ) Layer 2 protocol in a cellular communication system
US5701592A (en) * 1994-12-19 1997-12-23 Telefonaktiebolaget Lm Ericsson Method and system for desynchronizing overhead messages in a radiocommunication system
US6092222A (en) * 1994-12-19 2000-07-18 Nokia Telecommunications Oy Data transmission method, data transmission system, and cellular radio system
US5642356A (en) * 1995-02-24 1997-06-24 Hughes Electronics Optimal paging of one or two cellular mobile stations using a hard page slot
WO1996031956A1 (en) * 1995-04-07 1996-10-10 Motorola Inc. Method and apparatus for receiving a radio signal within a home control channel in a multichannel radio communication system
US5875387A (en) * 1995-04-07 1999-02-23 Motorola, Inc. Method and apparatus for receiving a radio signal within a home control channel in a multichannel radio communication system
US5687169A (en) * 1995-04-27 1997-11-11 Time Domain Systems, Inc. Full duplex ultrawide-band communication system and method
US6044265A (en) * 1995-06-05 2000-03-28 Bellsouth Corporation Methods and apparatus for cellular set programming
US5574728A (en) * 1995-06-27 1996-11-12 Motorola, Inc. Methods of terminal registration
US5604921A (en) * 1995-07-07 1997-02-18 Nokia Mobile Phones Ltd. Radiotelephone user interface for broadcast short message service
EP0977373A2 (en) * 1995-07-12 2000-02-02 Ericsson Inc. Dual mode satellite/cellular terminal
EP0977373A3 (en) * 1995-07-12 2002-02-13 Ericsson Inc. Dual mode satellite/cellular terminal
US5625629A (en) * 1995-08-07 1997-04-29 Hughes Electronics Method of ensuring bandwidth availability for non-page traffic in a communications systems
US6085087A (en) * 1995-08-29 2000-07-04 Kabushiki Kaisha Kenwood Roaming control method for digital mobile telephone
DE19681608B3 (en) * 1995-10-18 2012-04-19 Ericsson Inc. Procedures for calling mobile stations
US6091960A (en) * 1995-10-18 2000-07-18 Telefonaktiebolaget Lm Ericsson Method for paging mobile stations
US6577618B2 (en) 1995-10-18 2003-06-10 Telefonaktiebolaget L.M. Ericsson (Publ) Packet control channel feedback support for contention and reservation based access
GB2321371A (en) * 1995-10-18 1998-07-22 Ericsson Telefon Ab L M A method for paging mobile stations
US5910949A (en) * 1995-10-18 1999-06-08 Telefonaktiebolaget Lm Ericsson Packet channel feedback
WO1997015167A1 (en) * 1995-10-18 1997-04-24 Telefonaktiebolaget Lm Ericsson A method for paging mobile stations
GB2321371B (en) * 1995-10-18 2000-03-08 Ericsson Telefon Ab L M A method for paging mobile stations
WO1997020446A2 (en) * 1995-11-29 1997-06-05 Ericsson Inc. Detecting messages transmitted over a communications channel such as a paging channel
WO1997020446A3 (en) * 1995-11-29 1997-07-10 Ericsson Ge Mobile Inc Detecting messages transmitted over a communications channel such as a paging channel
US5930706A (en) * 1995-11-29 1999-07-27 Ericsson Inc. Detecting messages transmitted over a communications channel such as a paging channel
US7590083B2 (en) 1995-12-07 2009-09-15 Transcore Link Logistics Corp. Wireless packet data distributed communications system
US5937355A (en) * 1995-12-07 1999-08-10 Telefonaktiebolaget Lm Ericsson (Publ) Emergency call handling in a cellular telecommunication system
US20040219915A1 (en) * 1995-12-12 2004-11-04 At&T Wireless Services, Inc. Method for selecting a preferable wireless communications service provider in a multi-service provider environment
US5905955A (en) * 1995-12-12 1999-05-18 At&T Wireless Services Inc. Method for selecting a wireless service provider in a multi-service provider environment using a geographic database
US20080160982A1 (en) * 1995-12-12 2008-07-03 Bamburak Michael D Method for selecting a preferable wireless communications service provider in a multi-service provider environment
US6298235B1 (en) 1995-12-12 2001-10-02 At&T Wireless Services, Inc. Powered down selection of a preferable wireless communications service provider in a multi-service provider environment
US5999808A (en) * 1995-12-12 1999-12-07 Aeris Communications, Inc. Wireless gaming method
US8081973B2 (en) 1995-12-12 2011-12-20 At&T Mobility Ii Llc Method for selecting a preferable wireless communications service provider in a multi-service provider environment
US20040214573A1 (en) * 1995-12-12 2004-10-28 At&T Wireless Services, Inc. Method for selecting a wireless communication service provider in a multi-service provider environment
US6282420B1 (en) 1995-12-12 2001-08-28 At&T Wireless Services Inc. Method for selecting a wireless communications service provider in a multi-service provider environment
US7356338B2 (en) 1995-12-12 2008-04-08 At&T Mobility Ii Llc Method for selecting a wireless communication service provider in a multi-service provider environment
US6771961B2 (en) 1995-12-12 2004-08-03 At&T Wireless Services, Inc. Method for selecting a wireless communications service provider in a multi-service provider environment
US5832367A (en) * 1995-12-12 1998-11-03 At&T Wireless Services, Inc. Method for selecting a wireless communications service provider in a multi-service provider environment
US6782259B2 (en) 1995-12-12 2004-08-24 At&T Wireless Services, Inc. Method for selecting a preferable wireless communication service provider in a multi-service provider environment
US7346350B2 (en) 1995-12-12 2008-03-18 At&T Mobility Llc Method for selecting a preferable wireless communications service provider in a multi-service provider environment
US6430396B1 (en) 1995-12-12 2002-08-06 At&T Wireless Services, Inc. Method for selecting a wireless communications service provider in a multi-service provider environment
US6311064B1 (en) 1995-12-12 2001-10-30 At&T Wireless Services, Inc. Powered down selection of a preferable wireless communications service provider in a multi-service provider environment
US5881365A (en) * 1996-01-18 1999-03-09 Clariti Telecommunications International, Ltd. Digital compressed voice paging system which uses R.D.S. format for the ID signals and S.C.A. format for the voice signals both formats being FM subcarriers
US5845203A (en) * 1996-01-25 1998-12-01 Aertis Cormmunications Remote access application messaging wireless method
DE19605223A1 (en) * 1996-02-13 1997-08-14 Sel Alcatel Ag A method of operating a broadband connection between a mobile terminal and a network-side mobile device and mobile radio terminal, the network side mobile radio device and the mobile radio system
US5901143A (en) * 1996-02-13 1999-05-04 Alcatel Alsthom Compagnie Generale D Electricite Method of operating a broadband link between a mobile terminal and a network-side mobile radio facility, as well as mobile terminal, network-side mobile radio facility, and mobile radio system
US5751704A (en) * 1996-03-01 1998-05-12 Lucent Technologies Inc. Technique for minimizing the variance of interference in packetized interference-limited wireless communication systems
US5963869A (en) * 1996-03-14 1999-10-05 Ericsson Inc. Method and apparatus for management of analog and digital control channels
US5764632A (en) * 1996-04-01 1998-06-09 Nokia Mobile Phones Limited Mobile terminal having improved paging channel acquisition in a system using a digital control channel
US20100099411A1 (en) * 1996-06-28 2010-04-22 Bamburak Michael D Method for categorization of multiple providers in a wireless communication service environment
US20050113089A1 (en) * 1996-06-28 2005-05-26 At&T Wireless Services, Inc. Method for categorization of multiple providers in a wireless communications service environment
US9591602B2 (en) 1996-06-28 2017-03-07 At&T Mobility Ii Llc Method for categorization of multiple providers in a wireless communication service environment
US7664499B2 (en) 1996-06-28 2010-02-16 At&T Mobility Ii Llc Method for categorization of multiple providers in a wireless communication service environment
US9002355B2 (en) 1996-06-28 2015-04-07 At&T Mobility Llc Method for categorization of multiple providers in a wireless communication service environment
US6195532B1 (en) 1996-06-28 2001-02-27 At&T Wireless Srcs. Inc. Method for categorization of multiple providers in a wireless communications service environment
US7409213B2 (en) 1996-06-28 2008-08-05 At&T Mobility Ii Llc Method for categorization of multiple providers in a wireless communications service environment
US6807418B2 (en) 1996-06-28 2004-10-19 At&T Wireless Services, Inc. Method for categorization of multiple providers in a wireless communications service environment
US20090054062A1 (en) * 1996-06-28 2009-02-26 Bamburak Michael D Method for categorization of multiple providers in a wireless communication service environment
US8095133B2 (en) 1996-06-28 2012-01-10 At&T Intellectual Property I, L.P. Method for categorization of multiple providers in a wireless communication service environment
US6377787B1 (en) 1996-06-28 2002-04-23 At&T Wireless Services, Inc. Method for categorization of multiple providers in a wireless communications service environment
US8532068B2 (en) 1996-08-07 2013-09-10 Fipa Frohwitter Intellectual Property Ag Method of mobile communication and apparatus therefor
US7545789B2 (en) 1996-08-07 2009-06-09 Fipa Frohwitter Intellectual Property Ag Method of mobile communication and apparatus therefor
US7512100B2 (en) 1996-08-07 2009-03-31 Fipa Frohwitter Intellectual Property Ag Method of mobile communication and apparatus therefor
CN1311700C (en) * 1996-08-07 2007-04-18 株式会社日立制作所 Mobile communication method and device
US20040203626A1 (en) * 1996-08-07 2004-10-14 Hitachi, Ltd. Method of mobile communication and apparatus therefor
US20070086375A1 (en) * 1996-08-07 2007-04-19 Hitachi, Ltd. Method of mobile communication and apparatus therefor
US6813261B1 (en) 1996-08-07 2004-11-02 Hitachi, Ltd. Method of mobile communication and apparatus therefor
US6111869A (en) * 1996-08-07 2000-08-29 Hitachi, Ltd. Method of mobile communication and apparatus therefor
US8213397B2 (en) 1996-08-07 2012-07-03 Fipa Frohwitter Intellectual Property Ag Method of mobile communication and apparatus therefor
US6201974B1 (en) 1996-09-06 2001-03-13 Nokia Mobile Phones Limited Mobile station and network having hierarchical index for cell broadcast service
US6522877B1 (en) 1996-09-06 2003-02-18 Nokia Mobile Phones Ltd. Methods and apparatus for providing an interactive cell broadcast service
US6370391B1 (en) 1996-09-06 2002-04-09 Nokia Mobile Phones, Ltd Mobile station and network having hierarchical index for cell broadcast service
WO1998010605A1 (en) * 1996-09-06 1998-03-12 Nokia Mobile Phones Limited Mobile station and network having hierarchical index for cell broadcast service
US6464743B2 (en) 1996-09-11 2002-10-15 Fujitsu Limited Mobile telecommunication station
US6212373B1 (en) * 1996-09-11 2001-04-03 Fujitsu Limited Mobile telecommunication station
US6456843B1 (en) 1996-10-08 2002-09-24 At&T Wireless Services, Inc. Method and apparatus for over-the-air programming of telecommunication services
US7136633B2 (en) 1996-10-08 2006-11-14 Cingular Wireless Ii, Llc Method and apparatus for over-the-air programming of telecommunication services
US20020193103A1 (en) * 1996-10-08 2002-12-19 At&T Wireless Services, Inc. Method and apparatus for over-the-air programming of telecommunication services
US6646995B1 (en) 1996-10-11 2003-11-11 Alcatel Cit Method of adapting the air interface and mobile radio system and corresponding base transceiver station, mobile station and transmission mode
US6208624B1 (en) * 1996-11-14 2001-03-27 Ntt Mobile Communications Network Inc. Paging scheme for mobile communication system using increased paging channel data transmission rate
CN1101118C (en) * 1996-11-14 2003-02-05 Ntt移动通信网株式会社 Paging scheme for mobile communication system using increased paging chanel data transmission rate
WO1998023110A2 (en) * 1996-11-15 1998-05-28 Telefonaktiebolaget Lm Ericsson (Publ) Delivery of digital data messages in a dual mode cellular telephone network
WO1998023110A3 (en) * 1996-11-15 1998-09-11 Ericsson Telefon Ab L M Delivery of digital data messages in a dual mode cellular telephone network
US6163704A (en) * 1996-11-15 2000-12-19 Telefonaktiebolaget Lm Ericsson (Publ) Delivery of subscriber digital data messages in a dual mode cellular telephone network
US7539237B2 (en) 1996-12-06 2009-05-26 Alereon, Inc. Fast locking mechanism for channelized ultrawide-band communications
US5978366A (en) * 1996-12-20 1999-11-02 Ericsson Inc. Methods and systems for reduced power operation of cellular mobile terminals
US6600731B2 (en) * 1997-02-24 2003-07-29 Siemens Aktiengesellschaft Method and base station system for calling mobile stations for the transmission of packet data
US6275701B1 (en) * 1997-02-25 2001-08-14 Telefonaktiebolaget Lm Ericsson (Publ) Method and device in a mobile telecommunications system
US6633754B1 (en) * 1997-04-22 2003-10-14 Ericsson Inc. Systems and methods for increasing emergency call access speed in radiocommunication systems
US6029065A (en) * 1997-05-05 2000-02-22 Nokia Mobile Phones, Ltd. Remote feature code programming for mobile stations
US6408033B1 (en) 1997-05-12 2002-06-18 Texas Instruments Incorporated Method and apparatus for superframe bit allocation
US6128349A (en) * 1997-05-12 2000-10-03 Texas Instruments Incorporated Method and apparatus for superframe bit allocation
US7555302B2 (en) 1997-05-30 2009-06-30 Qualcomm Incorporated Dual event slotted paging
US8068859B2 (en) 1997-05-30 2011-11-29 Qualcomm Incorporated Dual event slotted paging
US8046005B2 (en) 1997-05-30 2011-10-25 Qualcomm Incorporated Dual event slotted paging
US20050064880A1 (en) * 1997-05-30 2005-03-24 Butler Brian K. Dual event slotted paging
US7983695B2 (en) 1997-05-30 2011-07-19 Qualcomm Incorporated Dual event slotted paging
EP1806946A2 (en) * 1997-05-30 2007-07-11 QUALCOMM Incorporated Quick and full indirect paging for CDMA wireless terminal via PICH channels.
US20070142066A1 (en) * 1997-05-30 2007-06-21 Qualcomm Incorporated Dual event slotted paging
EP1806946A3 (en) * 1997-05-30 2007-07-18 QUALCOMM Incorporated Quick and full indirect paging for CDMA wireless terminal via PICH channels.
EP2101537A1 (en) * 1997-05-30 2009-09-16 Qualcomm Incorporated Apparatus for maximisation of standby time of CDMA wireless terminals by two stage paging via a PICH or quick paging channel QPCH
EP1811802A1 (en) * 1997-05-30 2007-07-25 QUALCOMM Incorporated Quick PAGING for WCDMA wireless Terminals via PICH channels.
US7970420B2 (en) 1997-05-30 2011-06-28 Qualcomm Incorporated Dual event slotted paging
EP1811803A2 (en) * 1997-05-30 2007-07-25 QUALCOMM Incorporated Maximisation of standby time of CDMA wireless terminals by two stage paging via a PICH or quick paging channel QPCH.
US20080090594A1 (en) * 1997-05-30 2008-04-17 Qualcomm Incorporated Dual event slotted paging
EP2134131B1 (en) * 1997-05-30 2012-10-31 Qualcomm Incorporated Two stage paging of cellular terminals via a first paging indicator message.
EP1811803A3 (en) * 1997-05-30 2007-09-05 QUALCOMM Incorporated Maximisation of standby time of CDMA wireless terminals by two stage paging via a PICH or quick paging channel QPCH.
US8224356B2 (en) 1997-05-30 2012-07-17 Qualcomm Incorporated Dual event slotted paging
RU2460237C2 (en) * 1997-05-30 2012-08-27 Квэлкомм Инкорпорейтед Method of wireless terminal paging in wireless telecommunications system
US20070149221A1 (en) * 1997-05-30 2007-06-28 Qualcomm Incorporated Dual event slotted paging
US6064692A (en) * 1997-06-20 2000-05-16 Amati Communications Corporation Protocol for transceiver initialization
US6249543B1 (en) 1997-06-20 2001-06-19 Amati Communications Corporation Protocol for transceiver initialization
US6223042B1 (en) 1997-06-26 2001-04-24 At&T Wireless Services Inc Method of intelligent roaming using network information
US5991600A (en) * 1997-07-09 1999-11-23 Ericsson Inc. Integration of mobile station channel measurement with paging channel displacement operation in a wireless communications system
US6041217A (en) * 1997-07-29 2000-03-21 Vlsi Technology, Inc. Personal handyphone system hardware checking of broadcasting reception indication
US8712457B2 (en) 1997-07-30 2014-04-29 At&T Intellectual Property I, L.P. Method for dynamic multi-level pricing for wireless communications according to quality of service
US20060029089A1 (en) * 1997-07-30 2006-02-09 Bellsouth Intellectual Property Corporation System and method for dynamic allocation of capacity on wireless networks
US8908610B2 (en) 1997-07-30 2014-12-09 At&T Intellectual Property I, L.P. Associated systems and methods for providing data services using idle cell resources
US6026289A (en) * 1997-07-30 2000-02-15 Bellsouth Intellectual Property Corporation System and method for wireless broadcast on shared channels
US7050445B1 (en) 1997-07-30 2006-05-23 Bellsouth Intellectual Property Corporation System and method for dynamic allocation of capacity on wireless networks
US8265018B2 (en) 1997-07-30 2012-09-11 At&T Intellectual Property I, L.P. System and method for dynamic allocation of capacity on wireless networks
US7349333B2 (en) 1997-07-30 2008-03-25 At&T Delaware Intellectual Property, Inc. Associated systems and methods for providing data services using idle cell resources
US7463604B2 (en) 1997-07-30 2008-12-09 At&T Intellectual Property I, L.P. Method for dynamic multi-level pricing for wireless communications according to quality of service
US8718007B2 (en) 1997-07-30 2014-05-06 At&T Intellectual Property I, L.P. System and method for dynamic allocation of capacity on wireless networks
US20040125800A1 (en) * 1997-07-30 2004-07-01 Sam Zellner Associated systems and methods for providing data services using idle cell resources
US7046643B1 (en) 1997-07-30 2006-05-16 Bellsouth Intellectual Property Corporation Method for dynamic multi-level pricing for wireless communications according to quality of service
US20080259864A1 (en) * 1997-07-30 2008-10-23 Zellner Samuel N System and Method for Dynamic Allocation of Capacity on Wireless Networks
US7420981B2 (en) 1997-07-30 2008-09-02 At&T Delaware Intellectual Property, Inc. System and method for dynamic allocation of capacity on wireless networks
US9456453B2 (en) 1997-07-30 2016-09-27 At&T Intellectual Property I, L.P. System and method for dynamic allocation of capacity on wireless networks
US20060023665A1 (en) * 1997-07-30 2006-02-02 Bellsouth Intellectual Property Corporation Method for dynamic multi-level pricing for wireless communications according to quality of service
US8559942B2 (en) 1997-08-04 2013-10-15 Mundi Fomukong Updating a mobile device's location
US8706078B2 (en) 1997-08-04 2014-04-22 Enovsys Llc Location reporting satellite paging system with privacy feature
US6725068B2 (en) * 1997-08-05 2004-04-20 Tokyo Digital Phone Co., Ltd. Digital wireless telephone system
US6314292B1 (en) * 1997-08-15 2001-11-06 Nortel Networks Limited Method and apparatus for enhanced call setup
US6993340B1 (en) * 1997-08-19 2006-01-31 Nokia Networks Oy Information transmission in a telecommunications system
WO1999009775A3 (en) * 1997-08-19 1999-07-08 Kalle Ahmavaara Information transmission in a telecommunications system
WO1999009775A2 (en) * 1997-08-19 1999-02-25 Nokia Networks Oy Information transmission in a telecommunications system
US20050207388A1 (en) * 1997-08-19 2005-09-22 Nokia Networks Oy Information transmission in a telecommunications system
US7292861B2 (en) * 1997-08-19 2007-11-06 Nokia Corporation Logical channel selection for information transmission in a telecommunications system
US6163694A (en) * 1997-08-22 2000-12-19 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for standby state cell selection in a cellular telephone system
US6377564B1 (en) * 1997-10-21 2002-04-23 Ericsson Inc. Method for increasing uplink bandwidth over a dedicated control channel
US6680920B1 (en) 1997-10-29 2004-01-20 Skyworks Solutions, Inc. Power management system for a mobile station
US6137772A (en) * 1997-11-14 2000-10-24 Telefonaktiebolaget Lm Ericsson (Publ) Method of updating a list of digital control channels (DCCH) in a mobile station in a radio telecommunications network
US6240304B1 (en) * 1998-02-11 2001-05-29 Nokia Mobile Phones Ltd. Mobile terminal having RF power consumption optimization of extended standby mode
EP0939569A1 (en) * 1998-02-19 1999-09-01 ICO Services Ltd. Control information distribution in a TDMA mobile communication system
US6535497B1 (en) * 1998-05-11 2003-03-18 Telefonaktiebolaget Lm Ericsson (Publ) Methods and systems for multiplexing of multiple users for enhanced capacity radiocommunications
US6775548B1 (en) 1998-06-22 2004-08-10 Nokia Mobile Phones Ltd. Access channel for reduced access delay in a telecommunications system
EP0977370A1 (en) * 1998-07-28 2000-02-02 Lucent Technologies Inc. Transmission power control for packet switched communication systems
US6647005B1 (en) 1998-07-28 2003-11-11 Lucent Technologies Inc. Transmission power control for packet switched communications systems
US6470182B1 (en) 1998-08-17 2002-10-22 At&T Wireless Service, Inc. Mobile station roaming in a multiple service provider area
WO2000016575A1 (en) * 1998-09-10 2000-03-23 Siemens Aktiengesellschaft Method and radio communication system for providing a control channel
US7483699B2 (en) * 1998-09-22 2009-01-27 Qualcomm Incorporated Overhead message update with decentralized control
US6795425B1 (en) 1998-11-12 2004-09-21 Ericsson Inc. Wireless communications methods and apparatus employing paging attribute descriptors
WO2000030394A1 (en) * 1998-11-12 2000-05-25 Ericsson, Inc. Wireless communications methods and apparatus employing paging attribute descriptors
US6385461B1 (en) 1998-11-16 2002-05-07 Ericsson Inc. User group indication and status change in radiocommunications systems
WO2000030375A2 (en) * 1998-11-16 2000-05-25 Ericsson Inc. User group indication and status change in radiocommunication systems
WO2000030375A3 (en) * 1998-11-16 2000-10-05 Ericsson Inc User group indication and status change in radiocommunication systems
EP1135862A4 (en) * 1998-12-04 2002-04-03 Motorola Inc Method for determining whether to wake up a mobile station
US6889067B2 (en) 1998-12-04 2005-05-03 Motorola, Inc. Method for determining whether to wake up a mobile station
US6505058B1 (en) * 1998-12-04 2003-01-07 Motorola, Inc. Method for determining whether to wake up a mobile station
EP1135862A1 (en) * 1998-12-04 2001-09-26 Motorola, Inc. Method for determining whether to wake up a mobile station
EP1009106A3 (en) * 1998-12-10 2001-05-09 Lucent Technologies Inc. Management of a wireless control channel
US6545996B1 (en) 1998-12-10 2003-04-08 Lucent Technologies Inc. Management of wireless control channel
EP1009106A2 (en) * 1998-12-10 2000-06-14 Lucent Technologies Inc. Management of a wireless control channel
US6411629B1 (en) * 1998-12-29 2002-06-25 Northern Telecom Limited Data interleaving method
KR100870594B1 (en) 1999-01-22 2008-11-25 에릭슨 인크. Methods and systems for coding of broadcast messages
WO2000044122A1 (en) * 1999-01-22 2000-07-27 Ericsson, Inc. Methods and systems for coding of broadcast messages
US6498936B1 (en) 1999-01-22 2002-12-24 Ericsson Inc. Methods and systems for coding of broadcast messages
WO2000052948A1 (en) * 1999-03-04 2000-09-08 Telefonaktiebolaget Lm Ericsson (Publ) Coordinating different types of messages sent to mobile radios in a mobile communications system
US6968189B1 (en) * 1999-03-04 2005-11-22 Ico Services Ltd. Neighboring cell list generation in a mobile satellite communication system
US6438375B1 (en) 1999-03-04 2002-08-20 Telefonaktiebolaget Lm Ericsson (Publ) Coordinating different types of messages sent to mobile radios in a mobile communications system
US20020071480A1 (en) * 1999-03-08 2002-06-13 Pekka Marjelund Method for establishing a communication between a user equipment and a radio network
US7433334B2 (en) * 1999-03-08 2008-10-07 Nokia Corporation Method for establishing a communication link between a user equipment and a radio network
US9551785B1 (en) 1999-04-07 2017-01-24 James L. Geer Method and apparatus for the detection of objects using electromagnetic wave attenuation patterns
US6622251B1 (en) * 1999-04-07 2003-09-16 Telefonaktiebolaget Lm Ericsson (Publ) Method to put a mobile terminal into sleep when a frame control channel containing a location of slow broadcast channel does not include wakeup information
US6973055B1 (en) * 1999-04-28 2005-12-06 Koninklijke Philips Electronics N.V. Network with several network clusters for wireless transmission of packets
US6628946B1 (en) * 1999-05-20 2003-09-30 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for broadcasting system information in a cellular communications network
KR100733683B1 (en) 1999-05-20 2007-06-28 텔레폰악티에볼라겟엘엠에릭슨(펍) Method and apparatus for broadcasting system information in a cellular communications network
WO2000072609A1 (en) * 1999-05-20 2000-11-30 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for broadcasting system information in a cellular communications network
US6289227B1 (en) * 1999-05-20 2001-09-11 Qualcomm Incorporated Method and apparatus for scheduling wake-up time in a CDMA mobile station
WO2000074274A1 (en) * 1999-05-28 2000-12-07 Motorola Inc. Method and apparatus for providing simultaneous voice and data communication in a communication system
US20080068465A1 (en) * 1999-06-28 2008-03-20 Olympus Optical Co., Ltd. Camera system for communicating information related to user authorization and image data over a radio communication system
US7733377B2 (en) 1999-06-28 2010-06-08 Olympus Optical Co., Ltd. Camera system for communicating information related to user authorization and image data over a radio communication system
US6961540B1 (en) * 1999-06-28 2005-11-01 Olympus Optical Co., Ltd. Information processing system and camera system
US20040174435A1 (en) * 1999-06-28 2004-09-09 Olympus Optical Co., Ltd. Information processing system and camera system
US7379095B2 (en) 1999-06-28 2008-05-27 Olympus Optical Co., Ltd. Camera system for communicating information related to user authorization and image data over a radio communication system
US7224683B1 (en) * 1999-08-06 2007-05-29 Eads Secure Networks Radio communication method between a base station and mobile terminals, base stations and mobile terminals for implementing same
US7016320B1 (en) 1999-08-31 2006-03-21 Telefonaktiebolaget Lm Ericsson (Publ) Subscriber station, network control means and method for carrying out inter-frequency measurements in a mobile communication system
US6600917B1 (en) 1999-10-04 2003-07-29 Telefonaktiebolaget Lm Ericsson (Publ) Telecommunications network broadcasting of service capabilities
US7305012B1 (en) * 2000-07-24 2007-12-04 Siemens Information And Communication Networks S.P.A. Method and system to synchronize mobile units to a base transceiver station
US20020102994A1 (en) * 2001-01-30 2002-08-01 Nokia Corporation Method and apparatus for performing identification of measurement channels in TDMA E-OTD
US7024193B2 (en) * 2001-01-30 2006-04-04 Tuutijaervi Mika Method and apparatus for performing identification of measurement channels in TDMA E-OTD
US7181218B2 (en) 2001-04-10 2007-02-20 Telefonaktiebolaget Lm Ericsson (Publ) Commanding handover between differing radio access technologies
US20020160785A1 (en) * 2001-04-10 2002-10-31 Fredrik Ovesjo Commanding handover between differing radio access technologies
US8051360B2 (en) 2001-05-14 2011-11-01 Interdigital Technology Corporation Method and apparatus for processing a downlink shared channel
US8347177B2 (en) 2001-05-14 2013-01-01 Intel Corporation Method and apparatus for processing a downlink shared channel
US9026885B2 (en) 2001-05-14 2015-05-05 Intel Corporation Method and apparatus for processing a downlink shared channel
US20100318886A1 (en) * 2001-05-14 2010-12-16 Interdigital Technology Corporation Method and apparatus for processing a downlink shared channel
US8762811B2 (en) 2001-05-14 2014-06-24 Intel Corporation Method and apparatus for processing a downlink shared channel
US7869826B2 (en) * 2001-06-15 2011-01-11 Nokia Corporation Method and apparatus for relating communications system identifications (SIDS)
US20030022689A1 (en) * 2001-06-15 2003-01-30 Mcelwain John Method and apparatus for relating communications system identifications (SIDS)
US20030002472A1 (en) * 2001-06-29 2003-01-02 Samsung Electronics Co., Ltd. Method for transmitting HSDPA service information in a CDMA mobile communication system
DE10228808B4 (en) * 2001-06-29 2011-09-01 Samsung Electronics Co., Ltd. A method for transmitting HSDPA service information in a CDMA mobile communication system
US7299065B2 (en) * 2001-06-29 2007-11-20 Samsung Electronics Co., Ltd. Method for transmitting HSDPA service information in a CDMA mobile communication system
US20030027581A1 (en) * 2001-07-31 2003-02-06 Nokia Corporation System and method for automatic provisioning detection and notification
US8107937B2 (en) * 2001-07-31 2012-01-31 Nokia Corporation System and method for automatic provisioning detection and notification
US7187935B1 (en) 2001-10-16 2007-03-06 International Business Machines Corporation Method and software for low bandwidth presence via aggregation and profiling
US20030092386A1 (en) * 2001-10-26 2003-05-15 Gyorgy Miklos Predictable communication establishment in ad-hoc wireless network
US20050037719A1 (en) * 2002-01-31 2005-02-17 Mitsubishi Denki Kabushiki Kaisha Information notification method, mobile communications system, base station, and mobile station
US7532602B2 (en) 2002-01-31 2009-05-12 Mitsubishi Denki Kabushiki Kaisha Information transmission method, mobile communications system, base station and mobile station
US20060098602A1 (en) * 2002-01-31 2006-05-11 Mitsubishi Denki Kabushiki Kaisha Information transmission method, mobile communications system, base station and mobile station
US7593369B2 (en) 2002-01-31 2009-09-22 Mitsubishi Denki Kabushiki Kaisha Information transmission method, mobile communications system, base station and mobile station
US7656871B2 (en) 2002-01-31 2010-02-02 Mitsubishi Denki Kabushiki Kaisha Information transmission method, mobile communication system, base station, and mobile station
US20060109822A1 (en) * 2002-01-31 2006-05-25 Mitsubishi Denki Kabushiki Kaisha Information transmission method, mobile communications system, base station and mobile station
US7061892B2 (en) * 2002-01-31 2006-06-13 Mitsubishi Denki Kabushiki Kaisha Information notification method, mobile communications system, base station, and mobile station
US20030169723A1 (en) * 2002-03-05 2003-09-11 John Diachina Wireless communications apparatus, methods and computer program products using broadcast channel messaging for application transport
WO2003077589A1 (en) * 2002-03-05 2003-09-18 Ericsson, Inc. Wireless communications apparatus, methods and computer program products using broadcast channel messaging for application transport
US20030179738A1 (en) * 2002-03-05 2003-09-25 John Diachina Wireless communications apparatus, methods and computer program products using broadcast control channel messaging
US7177299B2 (en) 2002-04-24 2007-02-13 Ericsson Inc. Wireless communications apparatus, methods and computer program products using broadcast control channel messaging
US20040202143A1 (en) * 2002-04-24 2004-10-14 John Diachina Wireless communications apparatus, methods and computer program products using broadcast control channel messaging
WO2003092320A1 (en) * 2002-04-24 2003-11-06 Ericsson Inc. Wireless communications apparatus, methods and computer program products using broadcast control channel messaging
US20100172279A1 (en) * 2002-05-06 2010-07-08 Qualcomm Incorporated Multi-media broadcast and multicast service (mbms) in a wireless communication system
US8451770B2 (en) * 2002-05-06 2013-05-28 Qualcomm Incorporated Multi-media broadcast and multicast service (MBMS) in a wireless communication system
US20040042556A1 (en) * 2002-08-27 2004-03-04 Irina Medvedev Coded MIMO systems with selective channel inversion applied per eigenmode
US8194770B2 (en) 2002-08-27 2012-06-05 Qualcomm Incorporated Coded MIMO systems with selective channel inversion applied per eigenmode
US20040072574A1 (en) * 2002-09-27 2004-04-15 Matz William R. Apparatus and method for providing dynamic communications network traffic control
US7006831B2 (en) 2002-09-27 2006-02-28 Bellsouth Intellectual Property Corporation Apparatus and method for providing dynamic communications network traffic control
US20060142018A1 (en) * 2002-09-27 2006-06-29 Bellsouth Intellectual Property Corporation Apparatus and method for providing dynamic communications network traffic control
US8750151B2 (en) 2002-10-25 2014-06-10 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US9031097B2 (en) 2002-10-25 2015-05-12 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US8355313B2 (en) 2002-10-25 2013-01-15 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US9048892B2 (en) 2002-10-25 2015-06-02 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US8483188B2 (en) 2002-10-25 2013-07-09 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US8208364B2 (en) 2002-10-25 2012-06-26 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US8934329B2 (en) 2002-10-25 2015-01-13 Qualcomm Incorporated Transmit diversity processing for a multi-antenna communication system
US8570988B2 (en) 2002-10-25 2013-10-29 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US9013974B2 (en) 2002-10-25 2015-04-21 Qualcomm Incorporated MIMO WLAN system
US20040085939A1 (en) * 2002-10-25 2004-05-06 Wallace Mark S. Channel calibration for a time division duplexed communication system
US20040136349A1 (en) * 2002-10-25 2004-07-15 Walton J. Rodney MIMO system with multiple spatial multiplexing modes
US8711763B2 (en) 2002-10-25 2014-04-29 Qualcomm Incorporated Random access for wireless multiple-access communication systems
US20040156328A1 (en) * 2002-10-25 2004-08-12 Walton J. Rodney Random access for wireless multiple-access communication systems
US9154274B2 (en) 2002-10-25 2015-10-06 Qualcomm Incorporated OFDM communication system with multiple OFDM symbol sizes
US20040179627A1 (en) * 2002-10-25 2004-09-16 Ketchum John W. Pilots for MIMO communication systems
US20080285669A1 (en) * 2002-10-25 2008-11-20 Qualcomm Incorporated Mimo wlan system
US8218609B2 (en) 2002-10-25 2012-07-10 Qualcomm Incorporated Closed-loop rate control for a multi-channel communication system
US20080267098A1 (en) * 2002-10-25 2008-10-30 Qualcomm Incorporated Mimo system with multiple spatial multiplexing modes
US8873365B2 (en) 2002-10-25 2014-10-28 Qualcomm Incorporated Transmit diversity processing for a multi-antenna communication system
US8320301B2 (en) 2002-10-25 2012-11-27 Qualcomm Incorporated MIMO WLAN system
US8462643B2 (en) 2002-10-25 2013-06-11 Qualcomm Incorporated MIMO WLAN system
US9240871B2 (en) 2002-10-25 2016-01-19 Qualcomm Incorporated MIMO WLAN system
US9312935B2 (en) 2002-10-25 2016-04-12 Qualcomm Incorporated Pilots for MIMO communication systems
US8203978B2 (en) 2002-10-25 2012-06-19 Qualcomm Incorporated Multi-mode terminal in a wireless MIMO system
US20080049857A1 (en) * 2002-10-25 2008-02-28 Qualcomm Incorporated Data detection and demodulation for wireless communication systems
US8170513B2 (en) 2002-10-25 2012-05-01 Qualcomm Incorporated Data detection and demodulation for wireless communication systems
US9967005B2 (en) 2002-10-25 2018-05-08 Qualcomm Incorporated Pilots for MIMO communication systems
US8913529B2 (en) 2002-10-25 2014-12-16 Qualcomm Incorporated MIMO WLAN system
US8145179B2 (en) 2002-10-25 2012-03-27 Qualcomm Incorporated Data detection and demodulation for wireless communication systems
US7986742B2 (en) 2002-10-25 2011-07-26 Qualcomm Incorporated Pilots for MIMO communication system
US8134976B2 (en) 2002-10-25 2012-03-13 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US8169944B2 (en) 2002-10-25 2012-05-01 Qualcomm Incorporated Random access for wireless multiple-access communication systems
US8412220B2 (en) 2003-07-09 2013-04-02 Interdigital Technology Corporation Method and system wherein timeslots allocated for common control channels may be reused for user traffic
US9253645B2 (en) 2003-07-09 2016-02-02 Interdigital Technology Corporation Method and apparatus for scheduling dedicated transmissions in response to interference levels at neighboring base stations
US10009134B2 (en) 2003-07-09 2018-06-26 Interdigital Technology Corporation Method and apparatus for scheduling dedicated transmissions in response to interference levels at neighboring base stations
US20050193309A1 (en) * 2003-08-21 2005-09-01 Francesco Grilli Methods for forward error correction coding above a radio link control layer and related apparatus
US8291300B2 (en) 2003-08-21 2012-10-16 Qualcomm Incorporated Outer coding methods for broadcast/multicast content and related apparatus
US8694869B2 (en) 2003-08-21 2014-04-08 QUALCIMM Incorporated Methods for forward error correction coding above a radio link control layer and related apparatus
US8804761B2 (en) 2003-08-21 2014-08-12 Qualcomm Incorporated Methods for seamless delivery of broadcast and multicast content across cell borders and/or between different transmission schemes and related apparatus
US20050169205A1 (en) * 2003-08-21 2005-08-04 Francesco Grilli Methods for seamless delivery of broadcast and multicast content across cell borders and/or between different transmission schemes and related apparatus
US8599764B2 (en) * 2003-09-02 2013-12-03 Qualcomm Incorporated Transmission of overhead information for reception of multiple data streams
US8509051B2 (en) 2003-09-02 2013-08-13 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US20080107192A1 (en) * 2003-09-02 2008-05-08 Qualcomm Incorporated Systems and Methods for Generalized Slot-to-Interlace Mapping
US20080186935A1 (en) * 2003-09-02 2008-08-07 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US20100265865A9 (en) * 2003-09-02 2010-10-21 Rajiv Vijayan Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US20080291860A1 (en) * 2003-09-02 2008-11-27 Rajiv Vijayan Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US9668206B2 (en) 2003-09-02 2017-05-30 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US8605705B2 (en) 2003-09-02 2013-12-10 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US20050141475A1 (en) * 2003-09-02 2005-06-30 Qualcomm Incorporated Transmission of overhead information for reception of multiple data streams
US8477809B2 (en) 2003-09-02 2013-07-02 Qualcomm Incorporated Systems and methods for generalized slot-to-interlace mapping
US8526412B2 (en) 2003-10-24 2013-09-03 Qualcomm Incorporated Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system
US20050135308A1 (en) * 2003-10-24 2005-06-23 Qualcomm Incorporated Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system
EP1531562A3 (en) * 2003-11-15 2006-05-10 Samsung Electronics Co., Ltd. Appartaus and method for data rate transmission of user equipment in mobile communication system
US20050105487A1 (en) * 2003-11-18 2005-05-19 Interdigital Technology Corporation Method and system for providing channel assignment information used to support uplink and downlink channels
US7200405B2 (en) * 2003-11-18 2007-04-03 Interdigital Technology Corporation Method and system for providing channel assignment information used to support uplink and downlink channels
US9332569B2 (en) * 2003-11-18 2016-05-03 Interdigital Technology Corporation Method and system for providing channel assignment information used to support uplink and downlink channels
US20070173262A1 (en) * 2003-11-18 2007-07-26 Interdigital Technology Corporation Method and system for providing channel assignment information used to support uplink and downlink channels
US20110205992A1 (en) * 2003-11-18 2011-08-25 Interdigital Technology Corporation Method and system for providing channel assignment information used to support uplink and downlink channels
US7941151B2 (en) 2003-11-18 2011-05-10 Interdigital Technology Corporation Method and system for providing channel assignment information used to support uplink and downlink channels
US9473269B2 (en) 2003-12-01 2016-10-18 Qualcomm Incorporated Method and apparatus for providing an efficient control channel structure in a wireless communication system
US9876609B2 (en) 2003-12-01 2018-01-23 Qualcomm Incorporated Method and apparatus for providing an efficient control channel structure in a wireless communication system
WO2005060416A3 (en) * 2003-12-05 2006-09-14 Flarion Technologies Inc Methods and apparatus for performing handoffs in a multi-carrier wireless communications system
US20070173256A1 (en) * 2003-12-05 2007-07-26 Rajiv Laroia Methods and apparatus for performing handoffs in a multi-carrier wireless communications system
US20080287130A1 (en) * 2003-12-05 2008-11-20 Qualcomm Incorporated Base Station Base Methods and Apparatus For Supporting Break Before Making Handoffs In A Multi-Carrier System
WO2005060416A2 (en) * 2003-12-05 2005-07-07 Flarion Technologies, Inc. Methods and apparatus for performing handoffs in a multi-carrier wireless communications system
US20060073836A1 (en) * 2003-12-05 2006-04-06 Rajiv Laroia Base station based methods and apparatus for supporting break before make handoffs in a multi-carrier system
US20050124345A1 (en) * 2003-12-05 2005-06-09 Raiv Laroia Methods and apparatus for performing handoffs in a multi-carrier wireless communications system
US9485695B2 (en) * 2003-12-05 2016-11-01 Qualcomm Incorporated Methods and apparatus for performing handoffs in a multi-carrier wireless communications systems
US8554226B2 (en) 2003-12-05 2013-10-08 Qualcomm Incorporated Base station base methods and apparatus for supporting break before making handoffs in a multi-carrier system
US7376425B2 (en) 2003-12-05 2008-05-20 Qualcomm Incorporated Base station based methods and apparatus for supporting break before make handoffs in a multi-carrier system
US7212821B2 (en) * 2003-12-05 2007-05-01 Qualcomm Incorporated Methods and apparatus for performing handoffs in a multi-carrier wireless communications system
US8526962B2 (en) 2004-01-09 2013-09-03 Blackberry Limited Apparatus, and method, for implementing detection of system information changes in universal mobile telecommunications systems
US7346353B2 (en) 2004-01-09 2008-03-18 M-Stack Limited Apparatus and method for implementing detection of system information changes in universal mobile telecommunications systems
EP1553797A1 (en) * 2004-01-09 2005-07-13 M-Stack Limited Apparatus and method for implementing detection of system information changes in universal mobile telecommunications systems
US20080160981A1 (en) * 2004-01-09 2008-07-03 M-Stack Limited Apparatus and method for implementing detection of system information changes in universal mobile telecommunications systems
US8000713B2 (en) 2004-01-09 2011-08-16 Research In Motion Limited Apparatus and method for implementing detection of system information changes in universal mobile telecommunications systems
US20050153700A1 (en) * 2004-01-09 2005-07-14 Farnsworth Andrew J. Apparatus and method for implementing detection of system information changes in universal mobile telecommunications systems
US8180356B2 (en) 2004-09-30 2012-05-15 Huawei Technologies Co., Ltd. Method for notifying changes of cell information in multimedia broadcast/multicast service
US20060245386A1 (en) * 2004-09-30 2006-11-02 Hao Hu Method for notifying changes of cell information in multimedia broadcast/multicast service
US20070133456A1 (en) * 2005-03-28 2007-06-14 Huawei Technologies Co., Ltd. Method and System for Receiving Multimedia Broadcast/Multicast Service Control Information, and UE Thereof
CN1323563C (en) * 2005-03-28 2007-06-27 华为技术有限公司 Receiving method of multimedia brondiasting/group broadcast service control information
WO2006102807A1 (en) * 2005-03-28 2006-10-05 Huawei Technologies Co., Ltd. Method for receiving multimedia broadcast/multicast service control information
US20060227732A1 (en) * 2005-04-01 2006-10-12 Interdigital Technology Corporation Method and apparatus for providing multi-rate broadcast services
US8825098B2 (en) 2005-04-01 2014-09-02 Interdigital Technology Corporation Method and apparatus for providing multi-rate broadcast services
US8855226B2 (en) 2005-05-12 2014-10-07 Qualcomm Incorporated Rate selection with margin sharing
US7623842B2 (en) * 2005-06-15 2009-11-24 Nextel Communications Inc. System and method for determining a location of an emergency call in a sparsely-populated area
US20060286961A1 (en) * 2005-06-15 2006-12-21 Levitan Benjamin C System and method for determining a location of an emergency call in a sparsely-populated area
US20060285605A1 (en) * 2005-06-16 2006-12-21 Qualcomm Incorporated Coding and modulation for multiple data streams in a communication system
US8358714B2 (en) 2005-06-16 2013-01-22 Qualcomm Incorporated Coding and modulation for multiple data streams in a communication system
US8385878B2 (en) * 2005-06-28 2013-02-26 Qualcomm Incorporated Systems, methods, and apparatus for activity control in a wireless communications device
US20070178875A1 (en) * 2005-06-28 2007-08-02 Rao Anil S Systems, methods, and apparatus for activity control in a wireless communications device
US9516573B2 (en) 2005-10-31 2016-12-06 Lg Electronics Inc. Data transfer management in a radio communications network
US8830945B2 (en) 2005-10-31 2014-09-09 Lg Electronics Inc. Method for processing control information in a wireless mobile communication system
US20080298319A1 (en) * 2005-10-31 2008-12-04 Lee Young-Dae Data Receiving Method For Mobile Communication Terminal
US8831616B2 (en) 2005-10-31 2014-09-09 Lg Electronics Inc. Data transfer management in a radio communications network
US8817737B2 (en) 2005-10-31 2014-08-26 Lg Electronics Inc. Method of transmitting and receiving data in a mobile communication network
US9930580B2 (en) 2005-10-31 2018-03-27 Lg Electronics Inc. Data transfer management in a radio communications network
US20080285668A1 (en) * 2005-10-31 2008-11-20 Lee Young-Dae Method for Processing Control Information in a Wireless Mobile Communication System
US20090067542A1 (en) * 2005-12-27 2009-03-12 Telefonaktiebolaget L M Ericsson (Publ) Method and Device for Communicating Incremental Broadcast Information
WO2007073832A1 (en) * 2005-12-27 2007-07-05 Telefonaktiebolaget Lm Ericsson (Publ) Method and device for communicating incremental broadcast information
EP1804541A1 (en) * 2005-12-27 2007-07-04 Telefonaktiebolaget L M Ericsson (Publ) Method and device for communicating incremental broadcast information
US20080045185A1 (en) * 2006-08-18 2008-02-21 Samsung Electronics Co., Ltd. Method and apparatus for reporting reception ratio of streaming service by terminal in a mobile broadcasting system, and system thereof
US8463241B2 (en) 2006-08-18 2013-06-11 Samsung Electronics Co., Ltd Method and apparatus for reporting reception ratio of streaming service by terminal in a mobile broadcasting system, and system thereof
US20100113083A1 (en) * 2006-08-18 2010-05-06 Jijun Luo Transmission of organizational information depending on the direction in a systemwide channel
US8447347B2 (en) * 2006-08-18 2013-05-21 Nokia Siemens Networks Gmbh & Co. Kg Transmission of organizational information depending on the direction in a system-wide channel
US8594695B2 (en) 2007-02-16 2013-11-26 Intel Corporation Using location information to set radio transmitter characteristics for regulatory compliance
US20080200180A1 (en) * 2007-02-16 2008-08-21 Sean Dunn Using location information to set radio transmitter characteristics for regulatory compliance
US9596009B2 (en) 2007-04-20 2017-03-14 Blackberry Limited Multicast control channel design
US20080259842A1 (en) * 2007-04-20 2008-10-23 Research In Motion Multicast Control Channel Design
US20090175210A1 (en) * 2007-07-26 2009-07-09 Qualcomm Incorporated Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system
US8649795B2 (en) * 2007-09-05 2014-02-11 Blackberry Limited Multicast/broadcast single frequency network control information transmission
US20090061914A1 (en) * 2007-09-05 2009-03-05 Research In Motion Limited Multicast/Broadcast Single Frequency Network Control Information Transmission
US20090073908A1 (en) * 2007-09-13 2009-03-19 Research In Motion Limited Indication of Multicast Control Information
US8867423B2 (en) 2007-09-13 2014-10-21 Blackberry Limited Indication of multicast control information
US8077649B2 (en) 2007-09-13 2011-12-13 Research In Motion Limited Indication of multicast control information
US20090175282A1 (en) * 2008-01-04 2009-07-09 Babin Stephen W Using a Transmission Control Protocol (TCP) Channel to Save Power for Virtual Private Networks (VPNs) That Use User Datagram Protocol (UDP)
US8630218B2 (en) 2008-01-04 2014-01-14 International Business Machines Corporation Using a transmission control protocol (TCP) channel to save power for virtual private networks (VPNs) that use user datagram protocol (UDP)
US8228830B2 (en) * 2008-01-04 2012-07-24 International Business Machines Corporation Using a transmission control protocol (TCP) channel to save power for virtual private networks (VPNs) that use user datagram protocol (UDP)
US9060251B2 (en) 2008-02-21 2015-06-16 Samsung Electronics Co., Ltd. Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system
US20090213853A1 (en) * 2008-02-21 2009-08-27 Samsung Electronics Co., Ltd. Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system
US9602979B2 (en) 2008-02-21 2017-03-21 Samsung Electronics Co., Ltd Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system
US9602978B2 (en) 2008-02-21 2017-03-21 Samsung Electronics Co., Ltd Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system
US9980252B2 (en) 2008-03-03 2018-05-22 Smsung Electronics Co., Ltd Method and apparatus for transmitting/receiving control information in a wireless communication system
US9001776B2 (en) 2008-03-03 2015-04-07 Samsung Electronics Co., Ltd. Method and apparatus for transmitting/receiving control information in a wireless communication system
US9008037B2 (en) 2008-03-03 2015-04-14 Samsung Electronics Co., Ltd Method and apparatus for transmitting/receiving control information in a wireless communication system
US20090219884A1 (en) * 2008-03-03 2009-09-03 Samsung Electronics Co., Ltd. Method and apparatus for transmitting/receiving control information in a wireless communication system
US20090307560A1 (en) * 2008-06-05 2009-12-10 Panasonic Corporation Coding apparatus, coding processing target sequence forming method and viterbi decoding apparatus
US8276036B2 (en) * 2008-06-05 2012-09-25 Panasonic Corporation Coding apparatus, coding processing target sequence forming method and viterbi decoding apparatus
US20100034158A1 (en) * 2008-08-11 2010-02-11 Qualcomm Incorporated Processing measurement gaps in a wireless communication system
US8873522B2 (en) 2008-08-11 2014-10-28 Qualcomm Incorporated Processing measurement gaps in a wireless communication system
US8185138B2 (en) * 2008-10-13 2012-05-22 Qualcomm Incorporated Paging messages for power saving in a mobile WiMAX system
US20100093378A1 (en) * 2008-10-13 2010-04-15 Qualcomm Incorporated Methods and systems for power saving paging in a mobile wimax system
US8971224B2 (en) * 2008-10-30 2015-03-03 Samsung Electronics Co., Ltd. Multi-carriers managing device and method and sleep mode operating method of terminal
US20110216684A1 (en) * 2008-10-30 2011-09-08 Samsung Electronics Co., Ltd. Multi-carriers managing device and method and sleep mode operating method of terminal
US20100122098A1 (en) * 2008-11-12 2010-05-13 Cisco Technology, Inc. Generic network wake-up capabilities for terminal devices
US8082458B2 (en) * 2008-11-12 2011-12-20 Cisco Technology, Inc. Configuring an operating state of a terminal device
US8892722B1 (en) * 2009-06-22 2014-11-18 Marvell International Ltd. Peer-to-peer discovery systems and methods
US20110081898A1 (en) * 2009-10-02 2011-04-07 Sharp Laboratories Of America, Inc. Determining whether system information can be reused and managing system information in a wireless communication system
US8229412B2 (en) 2009-10-02 2012-07-24 Sharp Laboratories Of America, Inc. Determining whether system information can be reused and managing system information in a wireless communication system
US9450742B2 (en) 2010-04-30 2016-09-20 Samsung Electronics Co., Ltd. Apparatus and method for transmitting ACK/NACK in TDD system
US8705413B2 (en) * 2010-04-30 2014-04-22 Samsung Electronics Co., Ltd. Apparatus and method for transmitting ACK/NACK in TDD system
US20110267995A1 (en) * 2010-04-30 2011-11-03 Samsung Electronics Co., Ltd. Apparatus and method for transmitting ACK/NACK in TDD system
US9734645B2 (en) * 2010-10-15 2017-08-15 The Chamberlain Group, Inc. Method and apparatus pertaining to message-based functionality
US20120092125A1 (en) * 2010-10-15 2012-04-19 Jordan Ari Farber Method and Apparatus Pertaining to Message-Based Functionality
US20140226637A1 (en) * 2011-06-13 2014-08-14 Neul Ltd. Very long frame in a machine to machine communication network
US9749772B2 (en) * 2011-06-13 2017-08-29 Huawei Technologies Co., Ltd. Very long frame in a machine to machine communication network
US9036496B2 (en) 2012-01-09 2015-05-19 Qualcomm Incorporated Devices and methods for facilitating overhead message updates in wireless communications systems
US9918275B2 (en) * 2012-09-21 2018-03-13 Beijing Xinwei Telecom Technology Inc. Method and system for waking sleeping trunking terminal up
US20160119871A1 (en) * 2012-09-21 2016-04-28 Beijing Xinwei Telecom Technology Inc. Method and system for waking sleeping trunking terminal up

Also Published As

Publication number Publication date Type
CA2120600A1 (en) 1994-04-14 application
GB2275592B (en) 1997-03-26 grant
GB9406728D0 (en) 1994-06-15 grant
KR100270032B1 (en) 2000-10-16 grant
WO1994008432A1 (en) 1994-04-14 application
GB2275592A (en) 1994-08-31 application
CN1053782C (en) 2000-06-21 grant
RU2149518C1 (en) 2000-05-20 grant
CN1086061A (en) 1994-04-27 application
CA2120600C (en) 2002-01-22 grant

Similar Documents

Publication Publication Date Title
US6532226B1 (en) Method and arrangement for optimal scheduling of slotted-mode related measurements in a cellular radio system
US5533099A (en) Multi-mode radio telephone
US6377803B1 (en) Neighbour cell measurements for cell re-selection
US6483826B1 (en) Utilization of plural multiple access types for mobile telecommunications
US6385457B1 (en) Method and arrangement relating to radio communications systems
US5278835A (en) Mobile radio communication system
US5455962A (en) Performance through half-hopping and spatial diversity
US6480504B1 (en) Paging channel configuration for efficient wake-up period utilization
US5577046A (en) Automatic retransmission request
US5570467A (en) Method and apparatus for locating a digital control channel in a radiocommunication system
US6240288B1 (en) Power management system for a mobile unit by intelligent page monitoring
US6044270A (en) Apparatuses and methods for signal strength measurement in a wireless communication system
US6259915B1 (en) Multiple hyperband mobile and base stations
EP0687078A2 (en) A system for transmitting packet data in radio telephone TDMA systems
US20060252449A1 (en) Methods and apparatus to provide adaptive power save delivery modes in wireless local area networks (LANs)
US6353598B1 (en) Asymmetric multiple access protocol for a communication system
US5574973A (en) Method of registering/-reassigning a call in a dual mode communication network
US6553228B1 (en) Method and apparatus for distributing processing load for decoding paging messages in a radio communication system
US5918170A (en) Synchronizing radio telephone to receive every Nth overhead message train
US5642354A (en) Enhanced access burst in a wireless communication system
US5475677A (en) Compatible licensed and unlicensed band portable handset unit for TDMA wireless communications system
US4392242A (en) Mobile communication system
US6006091A (en) System and method of informing a radio telecommunications network of the operating capabilities of a mobile terminal located therein
US6038223A (en) Access scheme for packet data in a digital cellular communication system
US5870673A (en) Methods and systems for concurrent receipt of incoming calls from a wide area cellular network and a private radio communications network

Legal Events

Date Code Title Description
AS Assignment

Owner name: ERICSSON-GE MOBILE COMMUNICATIONS HOLDING INC., SW

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:RAITH, ALEX K.;REEL/FRAME:006284/0786

Effective date: 19921007

AS Assignment

Owner name: ERICSSON GE MOBILE COMMUNICATIONS INC., NORTH CARO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:RAITH, ALEX K.;REEL/FRAME:006393/0539

Effective date: 19930104

CC Certificate of correction
FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

REMI Maintenance fee reminder mailed
FPAY Fee payment

Year of fee payment: 12